Use a regex to fix newline characters in the RSA key

HTCondor 7.9.x changed the way that special characters are escaped in classads.  This broke the simple string replace function we had in place.  The regex will replace 1 or more \'s + n with \n.  Examples:

\\\\n -> \n
\\n -> \n
\\\\\\n -> \n
\n -> \n
fixed teh number of arguments.  Forgot to remove old args.
wrapped regex substitution in an str call to eliminate unicode and added debug logging
Remove the unused function
Failure to evaluate match_expr for one entry now does not affect other entries i the frontend. Issue #3336

Conflicts:
	frontend/glideinFrontendElement.py
	frontend/glideinFrontendLib.py
Reduce logging by summarize the errors once per schedd. Issue: #3336
Simplify list vs set lookups, clearer slices
Fixed logging after cherry-pick
Fixed code because of merge
Don't set process group id if factory is a session leader

Conflicts:
	factory/glideFactory.py
Make -force a no-op -- always send SIGKILL eventually.
Merge branch 'branch_master_3436'

Merging the fix for extra escape characters
Merge branch 'master' into master_2905

Conflicts:
	factory/glideFactory.py