ACCUMULO-4065 Tweak generics in RpcWrapper and related code

* depend more on compile time checks with generic checking
* use better naming of generic params (I for Iface, P for Processor) to clarify
  relationship between types
* remove unneeded casts and warnings suppressions
1 file changed
tree: 693dd9cbcbd661eac6508ef177a1a2c6503ef3f2
  1. examples/
  2. src/
  3. .gitignore
  4. pom.xml
  5. proxy.properties
  6. README