renamed Cluster._get_message_serializer to _process_config_imports and
modified it to also import provider if provider is a string.

Refactored my_import.

using the --provider flag on the command line

implement config_from_module

Provider conf

renamed Cluster._get_message_serializer to _process_config_imports and
modified it to also import provider if provider is a string.

Refactored my_import.

using the --provider flag on the command line

Remove unimplemented transaction & session APIs

removed connection kwargs from ConnectionPool.acquire

I realized these connection creation kwargs on ConnectionPool.acquire
were a potential issue, because while they would be used if a new
connection was created, if a connection was available it would be
acquired despite possibly having a different configuration entirely

Also, if different kwargs were passed in successive calls to acquire you could
end up with a pool of connections with different configurations and no
way of knowing which configuration you'd end up with after calling
acquire.

None of our code was using these.

the get_op method on Processor is replaced with get_op_args -- instead
of getting the op method, then calling it, in two steps, the serializer
instead calls get_op_args(op, args) which returns the args

Small fix to AsyncRemoteStrategy