[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/vendor/go.etcd.io/etcd/embed/config_logging_journal_windows.go b/vendor/go.etcd.io/etcd/embed/config_logging_journal_windows.go
new file mode 100644
index 0000000..5b76256
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/embed/config_logging_journal_windows.go
@@ -0,0 +1,27 @@
+// Copyright 2018 The etcd Authors
+//
+// 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.
+
+// +build windows
+
+package embed
+
+import (
+	"os"
+
+	"go.uber.org/zap/zapcore"
+)
+
+func getJournalWriteSyncer() (zapcore.WriteSyncer, error) {
+	return zapcore.AddSync(os.Stderr), nil
+}