Create hoodie-utilities-bundle to host the shaded jar

- hoodie-utilities can now be pulled in as compile time dependency
  - Lets users test their DeltaStreamer transformers for e.g
  - Tested the docker demo works & takes in the bundle
  - Doc changes to follow, to move DeltaStreamer commands to bundle jar

packaging/hoodie-utilities-bundle/src/main/java/com/uber/hoodie/utilities/bundle/Main.java

@@ -0,0 +1,36 @@
+/*
+ *  Copyright (c) 2019 Uber Technologies, Inc. (hoodie-dev-group@uber.com)
+ *
+ *  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 com.uber.hoodie.utilities.bundle;
+
+import com.uber.hoodie.common.util.ReflectionUtils;
+
+/**
+ * A simple main class to dump all classes loaded in current classpath
+ *
+ * This is a workaround for generating sources and javadoc jars for packaging modules. The maven plugins for generating
+ * javadoc and sources plugins do not generate corresponding jars if there are no source files.
+ *
+ * This class does not have anything to do with Hudi but is there to keep mvn javadocs/source plugin happy.
+ */
+public class Main {
+
+  public static void main(String[] args) {
+    ReflectionUtils.getTopLevelClassesInClasspath(Main.class).forEach(System.out::println);
+  }
+}