Make job_dagman_jobstate_log test more robust HTCONDOR-536
Make job_dagman_jobstate_log test more robust HTCONDOR-536

By ignore the "INTERNAL" lines in the dag log, which don't
contribute to correctness, and create race conditions wrt
job events.

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor