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"