Move the execution of job from the Sonar web server to the Maven Sonar plugin

Jobs are currently executed on the Sonar server side as soon as the sonar maven plugin triggers an event (call on web service). There isn't any advantage to execute those jobs on the server side but there are lot of inconveniences :

• Performance of the Sonar web server are highly impacted when jobs are launched
• As the sonar maven plugin and the job are asynchronous, there isn't any possibility on the maven site to launch a post processing for instance to generate a pdf
• Profiling the analysis mechanism requires to profile the Maven plugin and the sonar web server