Ignore pylint's return value so that message is displayed

Otherwise, the shell exits due to "set -e" when pylint has errors
before the output of pylint is displayed.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Update pylint output format

The old "output-format=parseable" is deprecated.  Replace with
a message-template string to give the same output.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Fix pylint 1.0.0 warnings

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>