Nomralize component start()/stop()

Also fixed the /schema swagger/rest entry. It did not work
because the 3rdparty protobuf_to_dict library cannot handle
Map fields. Changed the two map fields to a single list
entry.

Change-Id: Ib25a528701b67d58d32451687724c8247da6efa5
diff --git a/ofagent/protos/third_party/__init__.py b/ofagent/protos/third_party/__init__.py
index 6dab4e7..0608e8c 100644
--- a/ofagent/protos/third_party/__init__.py
+++ b/ofagent/protos/third_party/__init__.py
@@ -38,7 +38,7 @@
     def load_module(self, name):
         if name in sys.modules:
             return sys.modules[name]
-        full_name = 'ofagent.protos.third_party.' + name
+        full_name = 'voltha.protos.third_party.' + name
         import_module(full_name)
         module = sys.modules[full_name]
         sys.modules[name] = module