Support latest version of SonarQube Runner

I recently updated our SonarQube server to the latest version and our sonar generation tasks have stopped working. The buildr sonar.rb file doesn't support the newer SonarQube version.

The ant task dependency 'org.codehaus.sonar-plugins:sonar-ant-task:jar:1.3' needs to be updated to 'org.codehaus.sonar-plugins:sonar-ant-task:jar:2.2'.

The sonar ant task doesn't support the key and version attributes anymore, these have been replaced with properties projectKey and projectVersion

It also appears sonar.binaries and sonar.libraries has been deprecated and should be replaced with sonar.java.binaries and sonar.java.libraries