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
Merge branch 'branch_master_3436'

Merging the fix for extra escape characters