Configure maven-release-plugin to not push changes

To minimise issues on problematic releases, do not push tags, etc during
the release.

Author: hugoduncan

pom.xml

@@ -64,9 +64,11 @@
           </configuration>
       </plugin>
       <plugin>
-	<groupId>org.apache.maven.plugins</groupId>
 	<artifactId>maven-release-plugin</artifactId>
 	<version>2.0</version>
+        <configuration>
+          <pushChanges>false</pushChanges>
+        </configuration>
       </plugin>
     </plugins>
   </build>