Python3 pylint fixes
Sprinkle 'pylint disable' comments over the code base to silence a bunch
of pylint warnings on Python 3. All silenced warnings are harmless and
not bugs.
https://fedorahosted.org/freeipa/ticket/4985
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Martin Basti <mbasti@redhat.com>