[HUDI-875] Abstract hudi-sync-common, and support hudi-hive-sync, hudi-dla-sync (#1810)

- Generalize the hive-sync module for syncing to multiple metastores
- Added new options for datasource
- Added new command line for delta streamer 

Co-authored-by: Vinoth Chandar <vinoth@apache.org>

hudi-sync/pom.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  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.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <parent>
+    <artifactId>hudi</artifactId>
+    <groupId>org.apache.hudi</groupId>
+    <version>0.6.0-SNAPSHOT</version>
+  </parent>
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>hudi-sync</artifactId>
+  <packaging>pom</packaging>
+
+  <properties>
+    <main.basedir>${project.parent.basedir}</main.basedir>
+  </properties>
+
+  <modules>
+      <module>hudi-sync-common</module>
+      <module>hudi-hive-sync</module>
+      <module>hudi-dla-sync</module>
+  </modules>
+</project>