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

- functionality: reason "initial-mib-downloaded" reached
- omciAgent removed, object relation restructured
- adapter code restructuring + internal lib interface update

Change-Id: Ie53450a5e2c093aaaf68fe652f95e7b4c4a014c7
Signed-off-by: Holger Hildebrandt <holger.hildebrandt@adtran.com>
diff --git a/cmd/openonu-adapter/common.go b/cmd/openonu-adapter/common.go
new file mode 100644
index 0000000..7507288
--- /dev/null
+++ b/cmd/openonu-adapter/common.go
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2020-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 openonu-adapter main Common Logger initialization
+package main
+
+import (
+	"github.com/opencord/voltha-lib-go/v3/pkg/log"
+)
+
+var logger log.Logger
+
+func init() {
+	// Setup this package so that it's log level can be modified at run time
+	var err error
+	logger, err = log.AddPackage(log.JSON, log.ErrorLevel, log.Fields{"pkg": "main"})
+	// previously log.DebugLevel was set !?
+	if err != nil {
+		panic(err)
+	}
+}