Add test application for node/mastership based remote Java proxies

Change-Id: I90a7d03016d331f07c7f05ba355514c46a5e4b4f
diff --git a/apps/test/proxy/src/main/java/org/onosproject/proxytest/TestProxyImpl.java b/apps/test/proxy/src/main/java/org/onosproject/proxytest/TestProxyImpl.java
new file mode 100644
index 0000000..fb078c2
--- /dev/null
+++ b/apps/test/proxy/src/main/java/org/onosproject/proxytest/TestProxyImpl.java
@@ -0,0 +1,33 @@
+/*
+ * 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 org.onosproject.proxytest;
+
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Test proxy implementation.
+ */
+public class TestProxyImpl implements TestProxy {
+    @Override
+    public String testSync(String arg) {
+        return arg;
+    }
+
+    @Override
+    public CompletableFuture<String> testAsync(String arg) {
+        return CompletableFuture.completedFuture(arg);
+    }
+}