Description of problem:
Tab completion works if not required option was specified.

How reproducible:
always


Steps to Reproduce:
>> pulp-admin -u admin -p admin repo list --repo-id
Command: list
Description: lists repositories on the Pulp server

Available Arguments:

  --summary, -s - if specified, a condensed view with just the repository ID and
                  name is displayed
  --details     - if specified, detailed configuration information is displayed
                  for each repository
  --fields      - comma-separated list of repository fields; if specified, only
                  the given fields will displayed
The following options were specified but do not exist on the command:
  --repo-id

>> pulp-admin -u admin -p admin repo list --repo-id [TAB][TAB]
--details  --fields   --help     --repo-id  --summary  

Expected results:
>> pulp-admin -u admin -p admin repo list --repo-id [TAB][TAB]
{terminal bell}{terminal bell}{terminal bell}