Put back code so that MultiJob works when sub-jobs are disabled
Updated log message and added a newline to it.
Updated so that a check that the job is disabled is done before the deactivated job gets sheduled.

As suggested by Björn Kasteleiner
https://github.com/jenkinsci/tikal-multijob-plugin/pull/34#issuecomment-29417638
Merge pull request #34 from andresoderlind/ISSUE-J-20619

Put back code so that MultiJob works when sub-jobs are disabled