[thrift] otpification and sane configuration for Erlang Thrift

[thrift] otpification and sane configuration for Erlang Thrift

Summary: a small victory in the neverending quest of OTPifying this binding -- search for config files in ./conf/ (relative to the cwd of the emulator).  for example, when you start the channel server, ./conf/{channel,thrift}.conf should exist.  better than having to recompile to change a configuration ... reconfig should take care of that in running code.

Test Plan: works with channel server

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665284 13f79535-47bb-0310-9956-ffa450edef68