HUDI-123 Rename code packages/constants to org.apache.hudi (#830)

- Rename com.uber.hoodie to org.apache.hudi
- Flag to pass com.uber.hoodie Input formats for hoodie-sync
- Works with HUDI demo. 
- Also tested for backwards compatibility with datasets built by com.uber.hoodie packages
- Migration guide : https://cwiki.apache.org/confluence/display/HUDI/Migration+Guide+From+com.uber.hoodie+to+org.apache.hudi

hudi-hive/src/assembly/src.xml

@@ -0,0 +1,46 @@
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements.  See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership.  The ASF licenses this file
+ to you 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.
+  -->
+
+<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.3"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.3 http://maven.apache.org/xsd/assembly-1.1.3.xsd">
+  <id>jar-with-dependencies</id>
+  <formats>
+    <format>jar</format>
+  </formats>
+
+  <includeBaseDirectory>false</includeBaseDirectory>
+  <dependencySets>
+
+    <dependencySet>
+      <outputDirectory>/</outputDirectory>
+      <unpack>true</unpack>
+      <scope>runtime</scope>
+      <excludes>
+        <exclude>junit:junit</exclude>
+        <exclude>com.google.code.findbugs:*</exclude>
+        <exclude>org.apache.hbase:*</exclude>
+      </excludes>
+    </dependencySet>
+
+    <dependencySet>
+      <unpack>true</unpack>
+      <scope>provided</scope>
+    </dependencySet>
+  </dependencySets>
+</assembly>