Fix various Pep8 1.4.x warnings

Pep8 1.4.x has a few bugs being fixed where Pep8 rules
where not properly enforced. Fix the fallout:

tests/test_shell.py:53:80: E501 line too long (80 > 79 characters)
tests/v1/test_auth.py:217:36: E231 missing whitespace after ':'
tests/v1/test_security_services.py:121:46: E231 missing whitespace
tests/old/contrib/test_list_extensions.py:12:80: E501 line too long
(80 > 79 characters)

Change-Id: Iaf0b950e95127de3ffa7cede616839d53a410b0e
Merge "Fix various Pep8 1.4.x warnings"