[KYUUBI #1492] Initialize kyuubi flink sql engine module

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### _Why are the changes needed?_
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### _How was this patch tested?_
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Closes #1497 from yanghua/KYUUBI-1492.

Closes #1492

ba9f221 [yanghua] [KYUUBI #1492] Initialize kyuubi flink sql engine module

Authored-by: yanghua <yanghua1127@gmail.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>

Author: yanghua

externals/kyuubi-flink-sql-engine/pom.xml

@@ -0,0 +1,50 @@
+<?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>kyuubi-parent</artifactId>
+    <groupId>org.apache.kyuubi</groupId>
+    <version>1.5.0-SNAPSHOT</version>
+    <relativePath>../../pom.xml</relativePath>
+  </parent>
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>kyuubi-flink-sql-engine_2.12</artifactId>
+  <name>Kyuubi Project Engine Flink SQL</name>
+  <packaging>jar</packaging>
+
+  <dependencies>
+    <!-- kyuubi -->
+    <dependency>
+      <groupId>org.apache.kyuubi</groupId>
+      <artifactId>kyuubi-common_${scala.binary.version}</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+
+    <dependency>
+      <groupId>org.apache.kyuubi</groupId>
+      <artifactId>kyuubi-ha_${scala.binary.version}</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+
+  </dependencies>
+
+</project>

pom.xml

@@ -67,6 +67,7 @@
     <modules>
         <module>dev/kyuubi-codecov</module>
         <module>externals/kyuubi-download</module>
+        <module>externals/kyuubi-flink-sql-engine</module>
         <module>externals/kyuubi-spark-sql-engine</module>
         <module>kyuubi-assembly</module>
         <module>kyuubi-common</module>