Add a NullHandler when setting up library logging

I was gunna write a test, but mocking ImportErrors is a PITA, so I decided to
just get my tox py26 working instead.  Tests seem to fail/pass as expected
without/with the inline NullHanlder.

Closes-Bug: 1212861

Change-Id: I20207374a77ee9969ab201c3a57e4caf40c02a61
Reformat help outputs

Reformatted the help outputs in the swift client to bring them more
in line with the rest of the openstack clients. Changes were added to
all of the st_command_help variables and a new variable
st_command_options was added to help with correct formatting of
help outputs.

Change-Id: I0c549cf96292384ddb36b43ecec41a883d8b2e13
Implements: changes to help outputs
Merge "Reformat help outputs"