Mention the default ClientID in the sample readme (#321)

Commit log:
* Mention the default ClientID in the sample readme
* Fix typo

Author: TwistedTwigleg

samples/README.md

@@ -34,10 +34,7 @@ Status updates are continually printed to the console.
 
 Source: `samples/pubsub.py`
 
-Your Thing's
-[Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html)
-must provide privileges for this sample to connect, subscribe, publish,
-and receive.
+Your Thing's [Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html) must provide privileges for this sample to connect, subscribe, publish, and receive. Make sure your policy allows a client ID of `test-*` to connect or use `--client_id <client ID here>` to send the client ID your policy supports.
 
 <details>
 <summary>(see sample policy)</summary>
@@ -90,10 +87,7 @@ This sample is for reference on connecting via certificate and key files.
 
 Source: `samples/basic_connect.py`
 
-Your Thing's
-[Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html)
-must provide privileges for this sample to connect, subscribe, publish,
-and receive.
+Your Thing's [Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html) must provide privileges for this sample to connect. Make sure your policy allows a client ID of `test-*` to connect or use `--client_id <client ID here>` to send the client ID your policy supports.
 
 <details>
 <summary>(see sample policy)</summary>
@@ -127,10 +121,7 @@ This sample is for reference on connecting via websockets.
 
 Source: `samples/websocket_connect.py`
 
-Your Thing's
-[Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html)
-must provide privileges for this sample to connect, subscribe, publish,
-and receive.
+Your Thing's [Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html) must provide privileges for this sample to connect. Make sure your policy allows a client ID of `test-*` to connect or use `--client_id <client ID here>` to send the client ID your policy supports.
 
 <details>
 <summary>(see sample policy)</summary>
@@ -168,10 +159,7 @@ WARNING: Unix only. Currently, TLS integration with PKCS#11 is only available on
 
 source: `samples/pkcs11_connect.py`
 
-Your Thing's
-[Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html)
-must provide privileges for this sample to connect, subscribe, publish,
-and receive.
+Your Thing's [Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html) must provide privileges for this sample to connect. Make sure your policy allows a client ID of `test-*` to connect or use `--client_id <client ID here>` to send the client ID your policy supports.
 
 <details>
 <summary>(see sample policy)</summary>
@@ -257,10 +245,7 @@ you would use them by passing their certificate store path.
 
 source: `samples/windows_cert_connect.py`
 
-Your Thing's
-[Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html)
-must provide privileges for this sample to connect, subscribe, publish,
-and receive.
+Your Thing's [Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html) must provide privileges for this sample to connect. Make sure your policy allows a client ID of `test-*` to connect or use `--client_id <client ID here>` to send the client ID your policy supports.
 
 <details>
 <summary>(see sample policy)</summary>
@@ -329,7 +314,7 @@ To run this sample with a basic certificate from AWS IoT Core:
 
 This sample makes an MQTT connection and connects through a [Custom Authorizer](https://docs.aws.amazon.com/iot/latest/developerguide/custom-authentication.html). On startup, the device connects to the server and then disconnects. This sample is for reference on connecting using a custom authorizer.
 
-Your Thing's [Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html) must provide privileges for this sample to connect.
+Your Thing's [Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html) must provide privileges for this sample to connect. Make sure your policy allows a client ID of `test-*` to connect or use `--client_id <client ID here>` to send the client ID your policy supports.
 
 <details>
 <summary>(see sample policy)</summary>
@@ -385,10 +370,7 @@ Run the sample like this:
 python3 shadow.py --endpoint <endpoint> --ca_file <file> --cert <file> --key <file> --thing-name <name>
 ```
 
-Your Thing's
-[Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html)
-must provide privileges for this sample to connect, subscribe, publish,
-and receive.
+Your Thing's [Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html) must provide privileges for this sample to connect, subscribe, publish, and receive. Make sure your policy allows a client ID of `test-*` to connect or use `--client_id <client ID here>` to send the client ID your policy supports.
 
 <details>
 <summary>(see sample policy)</summary>
@@ -471,10 +453,8 @@ Run the sample like this:
 python3 jobs.py --endpoint <endpoint> --ca_file <file> --cert <file> --key <file> --thing_name <name>
 ```
 
-Your Thing's
-[Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html)
-must provide privileges for this sample to connect, subscribe, publish,
-and receive.
+Your Thing's [Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html) must provide privileges for this sample to connect, subscribe, publish, and receive. Make sure your policy allows a client ID of `test-*` to connect or use `--client_id <client ID here>` to send the client ID your policy supports.
+
 <details>
 <summary>(see sample policy)</summary>
 <pre>
@@ -548,10 +528,7 @@ Run the sample using createCertificateFromCsr:
 python3 fleetprovisioning.py --endpoint <endpoint> --ca_file <file> --cert <file> --key <file> --template_name <name> --template_parameters <parameters> --csr <csr file>
 ```
 
-Your Thing's
-[Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html)
-must provide privileges for this sample to connect, subscribe, publish,
-and receive.
+Your Thing's [Policy](https://docs.aws.amazon.com/iot/latest/developerguide/iot-policies.html) must provide privileges for this sample to connect, subscribe, publish, and receive. Make sure your policy allows a client ID of `test-*` to connect or use `--client_id <client ID here>` to send the client ID your policy supports.
 
 <details>
 <summary>(see sample policy)</summary>