Increase java version from 1.7 to 8 for compatibility with other pom's (#3816)

* Increse the java version from 7 to 8 to compatible pom's

Author: mandlil

java/pom.xml

@@ -109,7 +109,6 @@
         <plugin>
           <groupId>org.codehaus.mojo</groupId>
           <artifactId>animal-sniffer-maven-plugin</artifactId>
-          <version>1.15</version>
         </plugin>
         <plugin>
           <artifactId>maven-jar-plugin</artifactId>
@@ -168,8 +167,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>3.11.0</version>
         <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
+          <source>8</source>
+          <target>8</target>
           <encoding>UTF-8</encoding>
         </configuration>
       </plugin>

tools/java/common/pom.xml

@@ -31,8 +31,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>3.11.0</version>
         <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
+          <source>8</source>
+          <target>8</target>
           <encoding>UTF-8</encoding>
         </configuration>
       </plugin>

tools/java/cpp-build/pom.xml

@@ -27,8 +27,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>3.11.0</version>
         <configuration>
-          <source>1.7</source>
-	  <target>1.7</target>
+          <source>8</source>
+	  <target>8</target>
 	  <encoding>UTF-8</encoding>
         </configuration>
       </plugin>

tools/java/data/pom.xml

@@ -47,10 +47,10 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>2.0.2</version>
+        <version>3.11.0</version>
         <configuration>
-          <source>1.7</source>
-	  <target>1.7</target>
+          <source>8</source>
+	  <target>8</target>
 	  <encoding>UTF-8</encoding>
         </configuration>
       </plugin>

tools/java/java-build/pom.xml

@@ -47,10 +47,10 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>2.0.2</version>
+        <version>3.11.0</version>
         <configuration>
-          <source>1.7</source>
-	  <target>1.7</target>
+          <source>8</source>
+	  <target>8</target>
 	  <encoding>UTF-8</encoding>
         </configuration>
       </plugin>