[VOL-1034] This commit consists of:
1) Implement PM collections from the ONU
2) Update the Registration method to include for the adapter type
and its supported device types.

Change-Id: Id984468546328b6ebf2ca47578675c69b2b66f01
diff --git a/protos/ponsim.proto b/protos/ponsim.proto
index e477d98..1cd9e4e 100644
--- a/protos/ponsim.proto
+++ b/protos/ponsim.proto
@@ -44,6 +44,10 @@
     repeated PonSimPortMetrics metrics = 2;
 }
 
+message PonSimMetricsRequest {
+    int32 port = 1;
+}
+
 service PonSim {
     rpc SendFrame(PonSimFrame)
         returns (google.protobuf.Empty) {}