Spurious warnings emitted by ClientVersion when the library is relocated

[astei]

If the RabbitMQ library is relocated, it will emit a spurious warning about not being able to find the client version. This is because the property string (com.rabbitmq.client.version), is rewritten but rabbitmq-amqp-client.properties is not.

This is not a server issue, only a client library issue that does not affect operations, but for completeness:

• RabbitMQ version: 3.7.8
• Erlang version: Erlang/OTP 20 [erts-9.3] [source] [64-bit] [smp:2:2] [ds:2:2:10] [async-threads:64] [hipe] [kernel-poll:true]
• Other relevant information: https://gist.github.com/astei/1e439c19a29993d9486ff4a5afb9f145
• Smallest possible reproduction demo
• Client library version (for all libraries used): Java client 5.5.1
• Operating system, version, and patch level: Alpine Linux 3.8.1 on both server and client (we use Kubernetes to run RabbitMQ)

I have a PR to fix this issue, which I will open shortly.

[acogoluegnes]

@astei Thanks for this contribution. We'll release 5.5.2 with the fix in the new few days.