VOL-2909 - Disaggregating rw_core/core/.

This breaks the core package into logical components. (adapter manager, adapter proxy, devices, nbi/api), as well as the "core" which aggregates all these.

Change-Id: I257ac64024a1cf3efe3f5d89d508e60e6e681fb1
diff --git a/rw_core/core/adapter/common.go b/rw_core/core/adapter/common.go
new file mode 100644
index 0000000..d539a56
--- /dev/null
+++ b/rw_core/core/adapter/common.go
@@ -0,0 +1,33 @@
+/*
+ * 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 core Common Logger initialization
+package adapter
+
+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": "adapter"})
+	if err != nil {
+		panic(err)
+	}
+}