VOL-4077: Improve storage usage on etcd
- the onu adapter will now receive the tp instance on the
  inter-container kafka message and need not reach the etcd store
  to fetch it.
- on reconcile, the onu adapter need to go to the kv store to
  fetch the tp instance, but request the tp instance via a new
  API towards openolt adapter which in-turn will fetch from the
  cache.
- re-org the code in onu-metrics-manager to restore pm-data
  on reconcile to avoid panics by accessing uninitialzed data
  if ani-fsm were to try adding gem port for monitoring
  before pm-data is initialized properly.

Change-Id: I82a6de2772155f6e08390b671fe26d692dd02c99
diff --git a/internal/pkg/onuadaptercore/openonu.go b/internal/pkg/onuadaptercore/openonu.go
index b291b65..2c77aa2 100644
--- a/internal/pkg/onuadaptercore/openonu.go
+++ b/internal/pkg/onuadaptercore/openonu.go
@@ -24,14 +24,14 @@
 	"sync"
 	"time"
 
-	conf "github.com/opencord/voltha-lib-go/v4/pkg/config"
+	conf "github.com/opencord/voltha-lib-go/v5/pkg/config"
 
 	"github.com/golang/protobuf/ptypes"
-	"github.com/opencord/voltha-lib-go/v4/pkg/adapters/adapterif"
-	"github.com/opencord/voltha-lib-go/v4/pkg/db/kvstore"
-	"github.com/opencord/voltha-lib-go/v4/pkg/events/eventif"
-	"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/adapters/adapterif"
+	"github.com/opencord/voltha-lib-go/v5/pkg/db/kvstore"
+	"github.com/opencord/voltha-lib-go/v5/pkg/events/eventif"
+	"github.com/opencord/voltha-lib-go/v5/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 	"github.com/opencord/voltha-protos/v4/go/extension"
 	ic "github.com/opencord/voltha-protos/v4/go/inter_container"
 	"github.com/opencord/voltha-protos/v4/go/openflow_13"
@@ -305,6 +305,12 @@
 	return fmt.Errorf(fmt.Sprintf("handler-not-found-%s", targetDevice))
 }
 
+//Process_tech_profile_instance_request not implemented
+func (oo *OpenONUAC) Process_tech_profile_instance_request(ctx context.Context, msg *ic.InterAdapterTechProfileInstanceRequestMessage) *ic.InterAdapterTechProfileDownloadMessage {
+	logger.Error(ctx, "unImplemented")
+	return nil
+}
+
 //Adapter_descriptor not implemented
 func (oo *OpenONUAC) Adapter_descriptor(ctx context.Context) error {
 	return errors.New("unImplemented")