bash_completion shows options also when sub-command is "help"

[yatin]

bash_completion shows both options and subcommands when subcommand is "help". It should not show the options.
ex:
cinder <TAB><TAB> // Shows both Options and subcommands
cinder help <TAB><TAB> //Shows both Options and subommands, here only subcommands should be shown.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/139703

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/139703
Committed: https://git.openstack.org/cgit/openstack/python-cinderclient/commit/?id=e2afc016b248cf618a7076ecac492c4496e1e54c
Submitter: Jenkins
Branch: master

commit e2afc016b248cf618a7076ecac492c4496e1e54c
Author: yatin karel <email address hidden>
Date: Fri Dec 5 23:49:42 2014 +0530

    bash_completion now shows only subcommands when subcommand is "help"

    Options and subcommands are filtered. Now Only subcommands are shown
    when subcommands is "help". Both subcommands and options are shown
    when subcommand is other than "help"

    Change-Id: Iad9def1b2909af33fd23b0c89559b8de30fa6547
    Closes-Bug: #1399747