Create server side services from annotated classes

[thegridman]

Add the ability to create a server side gRPC service from annotated classes and interfaces in the same way that Jersey does for web services.

This work relates to the MP server issue #27

Requirements

• Classes or interfaces should be annotated with the @RpcService annotation.
• Use the name field from the annotation to specify the gRPC service name. If the name field is blank use the Class name.
• Methods should be annotated with annotations to represent one of the four supported method types @BidiStreaming, @ClientStreaming, @serverstreaming and @unary.
• Use the name field from the method annotation to specify the gRPC method name. If the name field is blank use the actual method name.
• Detect the request and response types from the method signature.
• Allow the request and response type to be explicitly configured using annotations on the methods