ebl Work on check_bacula.pl

ebl  Work on check_bacula.pl
      - Modify warning/critical threshold
          Ok = value < warning
          Warning = critical < value >= warning
          Critical = value >= critical
      - Add new options -M|-F to specify "max run test" or "count failed"
          => nothing will be done by default
      - Add JobId keyword in the scan of the storage status command
      - Add new level option

git-svn-id: https://bacula.svn.sourceforge.net/svnroot/bacula/trunk@8380 91ce42f0-d328-0410-95d8-f526ca767f89