title: Sonar - Error when upgrading to sonar 3.5.1
body: <p>I am trying to upgrade Sonar 3.3.2 to Sonar 3.5.1 and getting this error: Fail to request server version.  When I had the same error with version 3.3.2, it usually happened when the sonar server was down.  But now sonar 3.5.1 is up but I can't run analysis with Sonar Ant Task.  I am using sonar-ant-task-2.1.jar.  I also included property "sonar.forceAuthentication" and set it to "false".  I think that the Anyone group is granted a User role on the projest by default.  Has anyone seen this problem before?  Are there any additional properties I need to include?  Any help would be appreciated.   </p>