add serializer verification utility function for custom serializers

[VigneshVSV]

If the users use a custom serializer which is beyond the seriliazation protocols of supplied defaults with this package, a utility function can be provided which can verify if the serializer is a good fit for the RPC message encoding.

In this way, the serializer can be tested before using.

Possible Steps:

• add a function in utils.py which accepts the serializer as the input
• pass all the possible RPC messages to the serializer to serializer, preferably even create a simple client server implementation which is started and stopped before and after testing
• accept an argument for the additional data types which the serializer is capable and test the serializer on them
• print OK or not OK and what is the error