WIP [VOL-2811] - Incorporate preliminary onu-adapter-go code into opencord repo

- reason "discovery-mibsync-complete" reached (via full MibUpload only, received data won't be stored yet)
- first review comments of patchset #4 considered
 (please have a look into our inline-comments in Gerrit to know more about the current state)
- no refactoring done yet

Change-Id: Iac47817f8ce4bd28dd8132f530b0570d57ae99b8
Signed-off-by: Holger Hildebrandt <holger.hildebrandt@adtran.com>
diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/adapters/adapterif/adapter_proxy_if.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/adapters/adapterif/adapter_proxy_if.go
new file mode 100644
index 0000000..de5cfc0
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/adapters/adapterif/adapter_proxy_if.go
@@ -0,0 +1,36 @@
+/*
+ * 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 adapterif
+
+import (
+	"context"
+
+	"github.com/golang/protobuf/proto"
+	ic "github.com/opencord/voltha-protos/v3/go/inter_container"
+)
+
+// AdapterProxy interface for AdapterProxy implementation.
+type AdapterProxy interface {
+	SendInterAdapterMessage(ctx context.Context,
+		msg proto.Message,
+		msgType ic.InterAdapterMessageType_Types,
+		fromAdapter string,
+		toAdapter string,
+		toDeviceID string,
+		proxyDeviceID string,
+		messageID string) error
+}