[VOL-4931] openoltAdapter: memory leak seen in long term tests

Change-Id: Ieb60bd9b4bdf88fc22a3b6704854591c0c30717d
diff --git a/pkg/mocks/mockTechprofile.go b/pkg/mocks/mockTechprofile.go
index 1cc60a2..5234de5 100644
--- a/pkg/mocks/mockTechprofile.go
+++ b/pkg/mocks/mockTechprofile.go
@@ -34,6 +34,10 @@
 	return &db.Backend{Client: &MockKVClient{}}
 }
 
+// CloseKVClient to mock techprofile CloseKVClient method
+func (m MockTechProfile) CloseKVClient(ctx context.Context) {
+}
+
 // GetTPInstance to mock techprofile GetTPInstance method
 func (m MockTechProfile) GetTPInstance(ctx context.Context, path string) (interface{}, error) {
 	logger.Debug(ctx, "GetTPInstanceFromKVStore")