Cleanup python code

Author: pambrose

src/main/python/__init__.py renamed to python/__init__.py

@@ -1,4 +1,7 @@
 import grpc
+import sys
+
+sys.path.append('../build/generated/source/python')
 
 import helloworld_pb2_grpc
 

src/main/python/grpc_info.py renamed to python/grpc_info.py

@@ -7,7 +7,7 @@
 import logging
 import sys
 
-sys.path.append('build/generated/source/python')
+sys.path.append('../build/generated/source/python')
 
 import helloworld_pb2
 import grpc_info

src/main/python/helloworld_client.py renamed to python/helloworld_client.py

@@ -1,14 +1,13 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
+import grpc
 import logging
 import sys
 import time
 from concurrent import futures
 
-import grpc
-
-sys.path.append('build/generated/source/python')
+sys.path.append('../build/generated/source/python')
 
 import helloworld_pb2
 import helloworld_pb2_grpc