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/cmd/openonu-adapter/main.go b/cmd/openonu-adapter/main.go
index d5a396b..c42cef4 100644
--- a/cmd/openonu-adapter/main.go
+++ b/cmd/openonu-adapter/main.go
@@ -28,17 +28,17 @@
 	"syscall"
 	"time"
 
-	"github.com/opencord/voltha-lib-go/v4/pkg/adapters"
-	"github.com/opencord/voltha-lib-go/v4/pkg/adapters/adapterif"
-	com "github.com/opencord/voltha-lib-go/v4/pkg/adapters/common"
-	conf "github.com/opencord/voltha-lib-go/v4/pkg/config"
-	"github.com/opencord/voltha-lib-go/v4/pkg/db/kvstore"
-	"github.com/opencord/voltha-lib-go/v4/pkg/events"
-	"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/v4/pkg/probe"
-	"github.com/opencord/voltha-lib-go/v4/pkg/version"
+	"github.com/opencord/voltha-lib-go/v5/pkg/adapters"
+	"github.com/opencord/voltha-lib-go/v5/pkg/adapters/adapterif"
+	com "github.com/opencord/voltha-lib-go/v5/pkg/adapters/common"
+	conf "github.com/opencord/voltha-lib-go/v5/pkg/config"
+	"github.com/opencord/voltha-lib-go/v5/pkg/db/kvstore"
+	"github.com/opencord/voltha-lib-go/v5/pkg/events"
+	"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-lib-go/v5/pkg/probe"
+	"github.com/opencord/voltha-lib-go/v5/pkg/version"
 	ic "github.com/opencord/voltha-protos/v4/go/inter_container"
 	"github.com/opencord/voltha-protos/v4/go/voltha"