Fix OTA properties synchronization

[pennam]

Switching to ArduinoIoTCloud 1.3.0 from earlier version can lead to an OTA loop caused by bad synchronization of OTA_REQ property. The OTA loop occurs when the resulting CBOR message created calling sendPropertiesToCloud() is greater than 256 byte and thus it gets splitted in multiple parts. If the OTA variables are not synched within the firs part of the message the OTA process restart before the remainig properties are synched.

With this PR the OTA properties are synched all together within the same CBOR message ensuring a correct synchronization.

Updating an application builded with an ArduinoIoTCloud library < 1.3.0 with an OTA will still lead to an OTA process executed two times.

Thanks @eclipse1985 for spotting this.

/cc @zmoog

[codecov-commenter]

Codecov Report

Merging #289 (052b30e) into master (4c3af93) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #289   +/-   ##
=======================================
  Coverage   95.31%   95.31%           
=======================================
  Files          25       25           
  Lines         896      896           
=======================================
  Hits          854      854           
  Misses         42       42           

---

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[github-actions]

Memory usage change @ e51f540

Board	flash	%	RAM for global variables	%
arduino:mbed:envie_m4	🔺 0 - +64	0.0 - +0.01	0 - 0	0.0 - 0.0
arduino:mbed:envie_m7	🔺 +448 - +896	+0.06 - +0.11	0 - 0	0.0 - 0.0
arduino:mbed_nano:nanorp2040connect	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkr1000	🔺 +24 - +24	+0.01 - +0.01	0 - 0	0.0 - 0.0
arduino:samd:mkrgsm1400	🔺 +352 - +960	+0.13 - +0.37	0 - 0	0.0 - 0.0
arduino:samd:mkrnb1500	🔺 +24 - +24	+0.01 - +0.01	0 - 0	0.0 - 0.0
arduino:samd:mkrwan1300	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrwifi1010	🔺 0 - +1096	0.0 - +0.42	0 - 0	0.0 - 0.0
arduino:samd:nano_33_iot	🔺 0 - +1104	0.0 - +0.42	0 - 0	0.0 - 0.0
esp32:esp32:esp32	🔺 +72 - +72	+0.01 - +0.01	0 - 0	0.0 - 0.0
esp8266:esp8266:huzzah	🔺 +76 - +92	+0.01 - +0.01	🔺 +44 - +48	+0.05 - +0.06

Click for full report table

Board	examples/ArduinoIoTCloud-Advanced flash	%	examples/ArduinoIoTCloud-Advanced RAM for global variables	%	examples/ArduinoIoTCloud-Basic flash	%	examples/ArduinoIoTCloud-Basic RAM for global variables	%	examples/utility/ArduinoIoTCloud_Travis_CI flash	%	examples/utility/ArduinoIoTCloud_Travis_CI RAM for global variables	%	examples/utility/Provisioning flash	%	examples/utility/Provisioning RAM for global variables	%	examples/utility/SelfProvisioning flash	%	examples/utility/SelfProvisioning RAM for global variables	%
arduino:mbed:envie_m4	64	0.01	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:mbed:envie_m7	448	0.06	0	0.0	448	0.06	0	0.0	512	0.07	0	0.0	896	0.11	0	0.0
arduino:mbed_nano:nanorp2040connect	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkr1000	24	0.01	0	0.0	24	0.01	0	0.0	24	0.01	0	0.0	24	0.01	0	0.0
arduino:samd:mkrgsm1400	352	0.13	0	0.0	352	0.13	0	0.0	352	0.13	0	0.0	960	0.37	0	0.0
arduino:samd:mkrnb1500	24	0.01	0	0.0	24	0.01	0	0.0	24	0.01	0	0.0	24	0.01	0	0.0
arduino:samd:mkrwan1300	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrwifi1010	352	0.13	0	0.0	352	0.13	0	0.0	352	0.13	0	0.0	1096	0.42	0	0.0	0	0.0	0	0.0
arduino:samd:nano_33_iot	352	0.13	0	0.0	352	0.13	0	0.0	352	0.13	0	0.0	1104	0.42	0	0.0	0	0.0	0	0.0
esp32:esp32:esp32	72	0.01	0	0.0	72	0.01	0	0.0	72	0.01	0	0.0
esp8266:esp8266:huzzah	76	0.01	44	0.05	80	0.01	48	0.06	92	0.01	44	0.05

Click for full report CSV

Board,examples/ArduinoIoTCloud-Advanced<br>flash,%,examples/ArduinoIoTCloud-Advanced<br>RAM for global variables,%,examples/ArduinoIoTCloud-Basic<br>flash,%,examples/ArduinoIoTCloud-Basic<br>RAM for global variables,%,examples/utility/ArduinoIoTCloud_Travis_CI<br>flash,%,examples/utility/ArduinoIoTCloud_Travis_CI<br>RAM for global variables,%,examples/utility/Provisioning<br>flash,%,examples/utility/Provisioning<br>RAM for global variables,%,examples/utility/SelfProvisioning<br>flash,%,examples/utility/SelfProvisioning<br>RAM for global variables,%
arduino:mbed:envie_m4,64,0.01,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:mbed:envie_m7,448,0.06,0,0.0,448,0.06,0,0.0,512,0.07,0,0.0,896,0.11,0,0.0
arduino:mbed_nano:nanorp2040connect,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkr1000,24,0.01,0,0.0,24,0.01,0,0.0,24,0.01,0,0.0,24,0.01,0,0.0,,,,
arduino:samd:mkrgsm1400,352,0.13,0,0.0,352,0.13,0,0.0,352,0.13,0,0.0,960,0.37,0,0.0,,,,
arduino:samd:mkrnb1500,24,0.01,0,0.0,24,0.01,0,0.0,24,0.01,0,0.0,24,0.01,0,0.0,,,,
arduino:samd:mkrwan1300,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,,,,,,,,
arduino:samd:mkrwifi1010,352,0.13,0,0.0,352,0.13,0,0.0,352,0.13,0,0.0,1096,0.42,0,0.0,0,0.0,0,0.0
arduino:samd:nano_33_iot,352,0.13,0,0.0,352,0.13,0,0.0,352,0.13,0,0.0,1104,0.42,0,0.0,0,0.0,0,0.0
esp32:esp32:esp32,72,0.01,0,0.0,72,0.01,0,0.0,72,0.01,0,0.0,,,,,,,,
esp8266:esp8266:huzzah,76,0.01,44,0.05,80,0.01,48,0.06,92,0.01,44,0.05,,,,,,,,

[aentinger]

LGTM 👍 Minor nitpicks - use the feedback at your own caution - overall looks good 👍