[VOL-1158] Initial commit of grpc voltha service handler.  Also
add license to all files.

Change-Id: I923a53504c74939c1db8177df6197694f2c2b3cd
diff --git a/protos/common.proto b/protos/common.proto
index 4f9ea1e..aca0a36 100644
--- a/protos/common.proto
+++ b/protos/common.proto
@@ -11,6 +11,10 @@
     string id = 1;
 }
 
+enum TestModeKeys {
+    api_test=0;
+}
+
 message LogLevel {
     option (yang_child_rule) = MOVE_TO_PARENT_LEVEL;
 
@@ -21,6 +25,7 @@
         WARNING = 2;
         ERROR = 3;
         CRITICAL = 4;
+        FATAL = 5;
     }
 }