Add Ganglia metrics appropriate for the user collector.
Jeff suggestion: gridmanager_log in configuration, schedd_name in env variable
fix #7544: closing the file descriptor also when there is an exception and re-rising the exception - this time from branch_v3_2
Merge branch 'v3/7242' into branch_v3_2
Merge branch 'v3/7278' into branch_v3_2