VOL-4154: Changes to techprofile module for etcd storage improvements.
- using protobuf definitions of techprofile template and instance
- store smaller footprint resource instance on the kv store
- store techprofile instance in cache
- reconcile techprofile instance from resource instance on adapter restart
- retry etcd get/put/delete on failure
- remove dealing of onu-gem-info data from PONResourceManager module
  as adapter has to deal with this.

Change-Id: I741181e3f0dc5c4a419ffbed577eb4d21b73c4d6
diff --git a/pkg/adapters/common/adapter_proxy.go b/pkg/adapters/common/adapter_proxy.go
index 9ade0d1..fc31041 100644
--- a/pkg/adapters/common/adapter_proxy.go
+++ b/pkg/adapters/common/adapter_proxy.go
@@ -17,14 +17,15 @@
 
 import (
 	"context"
-	"github.com/opencord/voltha-lib-go/v4/pkg/db"
+	"github.com/opencord/voltha-lib-go/v5/pkg/db"
+	"google.golang.org/grpc/status"
 
 	"github.com/golang/protobuf/proto"
 	"github.com/golang/protobuf/ptypes"
 	"github.com/golang/protobuf/ptypes/any"
 	"github.com/google/uuid"
-	"github.com/opencord/voltha-lib-go/v4/pkg/kafka"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 	ic "github.com/opencord/voltha-protos/v4/go/inter_container"
 )
 
@@ -103,3 +104,62 @@
 	logger.Debugw(ctx, "inter-adapter-msg-response", log.Fields{"replyTopic": replyToTopic, "success": success})
 	return unPackResponse(ctx, rpc, "", success, result)
 }
+
+func (ap *AdapterProxy) TechProfileInstanceRequest(ctx context.Context,
+	tpPath string,
+	parentPonPort uint32,
+	onuID uint32,
+	uniID uint32,
+	fromAdapter string,
+	toAdapter string,
+	toDeviceId string,
+	proxyDeviceId string) (*ic.InterAdapterTechProfileDownloadMessage, error) {
+	logger.Debugw(ctx, "sending-tech-profile-instance-request-message", log.Fields{"from": fromAdapter,
+		"to": toAdapter, "toDevice": toDeviceId, "proxyDevice": proxyDeviceId})
+
+	// Set up the required rpc arguments
+	endpoint, err := ap.endpointMgr.GetEndpoint(ctx, toDeviceId, toAdapter)
+	if err != nil {
+		return nil, err
+	}
+
+	//Build the inter adapter message
+	tpReqMsg := &ic.InterAdapterTechProfileInstanceRequestMessage{
+		TpInstancePath: tpPath,
+		ParentDeviceId: toDeviceId,
+		ParentPonPort:  parentPonPort,
+		OnuId:          onuID,
+		UniId:          uniID,
+	}
+
+	args := make([]*kafka.KVArg, 1)
+	args[0] = &kafka.KVArg{
+		Key:   "msg",
+		Value: tpReqMsg,
+	}
+
+	topic := kafka.Topic{Name: string(endpoint)}
+	replyToTopic := kafka.Topic{Name: fromAdapter}
+	rpc := "process_tech_profile_instance_request"
+
+	ctx = context.WithValue(ctx, "inter-adapter-tp-req-msg", tpPath)
+	success, result := ap.kafkaICProxy.InvokeRPC(ctx, rpc, &topic, &replyToTopic, true, proxyDeviceId, args...)
+	logger.Debugw(ctx, "inter-adapter-msg-response", log.Fields{"replyTopic": replyToTopic, "success": success})
+	if success {
+		tpDwnldMsg := &ic.InterAdapterTechProfileDownloadMessage{}
+		if err := ptypes.UnmarshalAny(result, tpDwnldMsg); err != nil {
+			logger.Warnw(ctx, "cannot-unmarshal-response", log.Fields{"error": err})
+			return nil, err
+		}
+		return tpDwnldMsg, nil
+	} else {
+		unpackResult := &ic.Error{}
+		var err error
+		if err = ptypes.UnmarshalAny(result, unpackResult); err != nil {
+			logger.Warnw(ctx, "cannot-unmarshal-response", log.Fields{"error": err})
+		}
+		logger.Debugw(ctx, "TechProfileInstanceRequest-return", log.Fields{"tpPath": tpPath, "success": success, "error": err})
+
+		return nil, status.Error(ICProxyErrorCodeToGrpcErrorCode(ctx, unpackResult.Code), unpackResult.Reason)
+	}
+}