Throw exception on quality gate fail/error status at plugin level instead of sonar scanner

[softreigns]

1. Since the plugin requires the sonar param sonar.qualitygate.wait=false to run in a fail case, where if it true the scan waits and fails before the plugin can run.
   ref: Failing a pipeline job when the Quality Gate fails

   Hence adding a parameter at plugin level to be able to run the plugin and still be able to fail the scan job.

2. Update gitlab-ci with the latest.