Only allow SCRAM_ARCH=slc6* to run on SL6 glideins.
Change exit code for missing software to 10034; #4137.
Only allow SLC6 jobs to run on SLC6 worker nodes.
Sleep for a minimal amount of time on missing software failure.
Merge branch 'htcondor_poc' of github.com:dmwm/CRABServer into htcondor_poc