upgrade version for maven-compiler-plugin

Author: binarywang

pom.xml

@@ -70,6 +70,9 @@
   </modules>
 
   <properties>
+    <maven.compiler.source>1.7</maven.compiler.source>
+    <maven.compiler.target>1.7</maven.compiler.target>
+    
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <downloadJavadocs>true</downloadJavadocs>
     <downloadSources>true</downloadSources>
@@ -301,10 +304,8 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>2.3.2</version>
+        <version>3.6.0</version>
         <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
           <encoding>UTF-8</encoding>
         </configuration>
       </plugin>