Revert "Pylint - Updates to remove disablement of pylint warnings present in"

This reverts commit f5d62e42ae52faca1b0a5aa38f272765cc538e66.
resolve pylint errors on Fedora 19

addressing:
+ pylint --rcfile=/etc/spacewalk-pylint.rc --additional-builtins=_ katello
************* Module katello.client.core.utils
W1401:296,0: Anomalous backslash in string: '\0'. String constant might be missing an r prefix.
W1401:298,0: Anomalous backslash in string: '\0'. String constant might be missing an r prefix.
W1401:309,0: Anomalous backslash in string: '\0'. String constant might be missing an r prefix.
W1401:320,0: Anomalous backslash in string: '\|'. String constant might be missing an r prefix.
Merge pull request #1391 from xsuchy/pull-req-pylint-F19

resolve pylint errors on Fedora 19
894480 - remove PyXML dependency

Quote from BZ:
I've opened up a Fedora 19 Feature to remove PyXML due to a combination of it being dead upstream for many years and that when it's installed, the python stdlib overwrites its own xml module with PyXML.  This combination leads to errors because PyXML's code is older and contains bugs that have been fixed in the stdlib.
make travis happy
Merge pull request #1389 from xsuchy/pull-req-bz894480

894480 - remove PyXML dependency