trove help contents in README is outdated

[Sushil Kumar]

trove help contents are not updated with the latest trove help contents.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/95331

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/95331
Committed: https://git.openstack.org/cgit/openstack/python-troveclient/commit/?id=64a19ad8c6dfb86ba7ca48b93360b172d7585365
Submitter: Jenkins
Branch: master

commit 64a19ad8c6dfb86ba7ca48b93360b172d7585365
Author: SushilKM <email address hidden>
Date: Sat May 24 08:05:17 2014 +0000

    Updates README with current trove help output

    Reasons:
    - trove help section in README shows old options, trove help message
      has changed now, and the section needs the update.

    Changes:
    - Updates the trove help section in README.
    - The updates have been picked up from latest trove help output.

    Change-Id: I37b6f3ad5d3ac0497eec179a4de447e5b39fb215
    Closes-Bug: #1322819