[VOL-2715]  Fix device delete issue

Change-Id: I148ff39c6ff976a1aae5f9d17c1ea9a043f12f37
diff --git a/rw_core/core/grpc_nbi_api_handler_test.go b/rw_core/core/grpc_nbi_api_handler_test.go
index 6122b51..1b956d2 100755
--- a/rw_core/core/grpc_nbi_api_handler_test.go
+++ b/rw_core/core/grpc_nbi_api_handler_test.go
@@ -73,8 +73,8 @@
 	test.oltAdapterName = "olt_adapter_mock"
 	test.onuAdapterName = "onu_adapter_mock"
 	test.coreInstanceID = "rw-nbi-test"
-	test.defaultTimeout = 50 * time.Second
-	test.maxTimeout = 300 * time.Second
+	test.defaultTimeout = 10 * time.Second
+	test.maxTimeout = 20 * time.Second
 	return test
 }