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/omci_ani_config.go b/internal/pkg/onuadaptercore/omci_ani_config.go
index b6ca5e4..94cf938 100644
--- a/internal/pkg/onuadaptercore/omci_ani_config.go
+++ b/internal/pkg/onuadaptercore/omci_ani_config.go
@@ -30,7 +30,7 @@
 	"github.com/looplab/fsm"
 	"github.com/opencord/omci-lib-go"
 	me "github.com/opencord/omci-lib-go/generated"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 	//ic "github.com/opencord/voltha-protos/v4/go/inter_container"
 	//"github.com/opencord/voltha-protos/v4/go/openflow_13"
 	//"github.com/opencord/voltha-protos/v4/go/voltha"
@@ -1374,7 +1374,7 @@
 			_ = oFsm.pAdaptFsm.pFsm.Event(aniEvReset)
 			return
 		}
-		// Mark the gem port to be removed for Performance History monitoring
+		// Mark the gem port to be added for Performance History monitoring
 		if oFsm.pDeviceHandler.pOnuMetricsMgr != nil {
 			oFsm.pDeviceHandler.pOnuMetricsMgr.AddGemPortForPerfMonitoring(ctx, gemPortAttribs.gemPortID)
 		}