Compiler Version Fix

[abhinavguptas]

[ERROR] error: Source option 6 is no longer supported. Use 7 or later.
The build was failing on running "mvn package"

I had to fix it by changing pom.xml to following

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>2.3.2</version>
    <configuration>
        <source>1.7</source>
        <target>1.7</target>
        <!-- 
            Not working 
        <source>${java.version}</source>
        <target>${java.version}</target>
         -->
    </configuration>
</plugin>

Please review if this is a good general fix for pom.xml, or any other change is needed else where.