Add BATCH_GAHP_CHECK_STATUS_ATTEMPTS parameter for INFN jobs. #3533

BATCH_GAHP_CHECK_STATUS_ATTEMPTS allows the INFN job manager to
be resilliant to failures in job status checks.  The configuration
option is an integer describing the number of failed attempts
allowed before putting the job on hold.
Don't assume CONDOR_ADMIN is set.
For Bosco, leave CONDOR_ADMIN unset by default.

For many Bosco users, the default email address won't be valid or will
be an address that's never checked.
Remove unused variables in condor_preen.
Add stderr to held reason for infn job attempts submit failure. #3489
Remove ending '-' at the end of the output of ssh-keygen in bosco_cluster.

From the OSG Jira CAMPUS-91
Move check for qstat error in blahp's pbs_status.sh.

It appears SLURM's qstat can exit 153 without printing anything to
stderr. So check for exit 153 before checking for empty stderr.

From the OSG Jira CAMPUS-93
Follow symlinks when doing Bosco cluster installation.

Add -K option to the rsync for bosco final install. This will preserve
symlinks on the target system, if they exist.  Important for systems
which symlink the bosco directory to another area.

From OSG Jira CAMPUS-92
Merge branch 'V7_9-bosco_1_2-branch'

Conflicts:
	src/condor_utils/param_info.in