fix elasticsearch in pom Consistent with other IOs (apache#3696)

### Motivation

fix elasticsearch in pom Consistent with other IOs

### Modifications

pom.xml add elasticsearch.version propertie

pom.xml

@@ -180,6 +180,7 @@ flexible messaging model and an intuitive client API.</description>
     <jclouds.version>2.1.1</jclouds.version>
     <sqlite-jdbc.version>3.8.11.2</sqlite-jdbc.version>
     <mysql-jdbc.version>8.0.11</mysql-jdbc.version>
+    <elasticsearch.version>6.3.2</elasticsearch.version>
     <presto.version>0.206</presto.version>
     <flink.version>1.6.0</flink.version>
     <scala.binary.version>2.11</scala.binary.version>
@@ -978,6 +979,11 @@ flexible messaging model and an intuitive client API.</description>
         <artifactId>opencensus-contrib-grpc-metrics</artifactId>
         <version>${opencensus.version}</version>
       </dependency>
+      <dependency>
+        <groupId>org.elasticsearch.client</groupId>
+        <artifactId>elasticsearch-rest-high-level-client</artifactId>
+        <version>${elasticsearch.version}</version>
+      </dependency>
     </dependencies>
   </dependencyManagement>
 

pulsar-io/elastic-search/pom.xml

@@ -56,13 +56,11 @@
     <dependency>
       <groupId>org.apache.commons</groupId>
       <artifactId>commons-lang3</artifactId>
-      <version>3.4</version>
     </dependency>
 
   	<dependency>
   		<groupId>org.elasticsearch.client</groupId>
   		<artifactId>elasticsearch-rest-high-level-client</artifactId>
-  		<version>6.3.2</version>
   	</dependency>
 
   	<dependency>

tests/integration/pom.xml

@@ -129,7 +129,6 @@
     <dependency>
   	  <groupId>org.elasticsearch.client</groupId>
   	  <artifactId>elasticsearch-rest-high-level-client</artifactId>
-  	  <version>6.3.2</version>
   	</dependency>
 
   </dependencies>