Summary:
RSocket server which implements the ServerAdapter interface.
Most of the code was taken from the ServerController class with a few minor adjustments.
Once ServerController starts using ServerAdapter instances the code will be removed from there.
Reviewed By: fabiomassimo
Differential Revision: D29984578
fbshipit-source-id: e35e7635dff995314b3c1fbc85177f90384e025d
6c72e78d04