[VOL-4292] OpenOLT Adapter changes for gRPC migration

Change-Id: I5af2125f2c2f53ffc78c474a94314bba408f8bae
diff --git a/pkg/mocks/mockEventproxy.go b/pkg/mocks/mockEventproxy.go
index 50ffbd9..892e159 100644
--- a/pkg/mocks/mockEventproxy.go
+++ b/pkg/mocks/mockEventproxy.go
@@ -20,7 +20,8 @@
 import (
 	"context"
 	"errors"
-	"github.com/opencord/voltha-protos/v4/go/voltha"
+
+	"github.com/opencord/voltha-protos/v5/go/voltha"
 )
 
 // MockEventProxy for mocking EventProxyIntf
@@ -63,3 +64,12 @@
 func (me *MockEventProxy) SendLiveness(ctx context.Context) error {
 	return nil
 }
+
+// Start starts the proxy
+func (me *MockEventProxy) Start() error {
+	return nil
+}
+
+// Stop stops the proxy
+func (me *MockEventProxy) Stop() {
+}