[VOL-2235] Mocks and interfaces for rw-core

This update consists of mocks that are used by the rw-core
during unit testing.  It also includes interfaces used for unit
tests.

Change-Id: I20ca1455c358113c3aa897acc6355e0ddbc614b7
diff --git a/rw_core/coreIf/device_ownership_if.go b/rw_core/coreIf/device_ownership_if.go
new file mode 100644
index 0000000..fb19097
--- /dev/null
+++ b/rw_core/coreIf/device_ownership_if.go
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package coreIf
+
+import (
+	"context"
+)
+
+type DeviceOwnership interface {
+	Start(ctx context.Context)
+	Stop(ctx context.Context)
+	OwnedByMe(id interface{}) (bool, error)
+	AbandonDevice(id string) error
+	GetAllDeviceIdsOwnedByMe() []string
+}