This commit consists of the following:
1) The kafka messaging proxy in Twisted python for adapters
2) Initial implementation and containerization of ponsim OLT adapter
and ponsim ONU adapter
3) Initial submission of request and response facade in both Twisted
python and Go Language
4) Initial implementation of device management and logical device management
in the Core
5) Update to the log module to allow dynamic setting of log level per
package using the gRPC API
6) Bug fixes and minor changes

Change-Id: Ia8f033da84cfd08275335bae9542802415e7bb0f
diff --git a/protos/core_adapter.proto b/protos/core_adapter.proto
index 5021b9a..d828194 100644
--- a/protos/core_adapter.proto
+++ b/protos/core_adapter.proto
@@ -1,6 +1,9 @@
 syntax = "proto3";
 
 import "google/protobuf/any.proto";
+import "openflow_13.proto";
+import public "logical_device.proto";
+
 
 option go_package = "github.com/opencord/voltha-go/protos/core_adapter";
 
@@ -18,8 +21,14 @@
     bool val = 1;
 }
 
+enum ErrorCode {
+        UNSUPPORTED_REQUEST = 0;
+        INVALID_PARAMETERS = 1;
+}
+
 message Error {
-    string reason = 1;
+    ErrorCode code = 1;
+    string reason = 2;
 }
 
 enum MessageType {
@@ -56,3 +65,12 @@
     bool success = 1;
     google.protobuf.Any result = 3;
 }
+
+message SwitchCapability {
+    openflow_13.ofp_desc desc = 1;
+    openflow_13.ofp_switch_features switch_features = 2;
+}
+
+message PortCapability {
+    LogicalPort port = 1;
+}
\ No newline at end of file