rally show doesn't display properly resources in case of specified users in deployment

[Boris Pavlovic]

Instead of having for each user own rows we were adding rows to single array. Which produce terrible output

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/168636

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/168636
Committed: https://git.openstack.org/cgit/openstack/rally/commit/?id=bd6e99cf30b9f9ec6128f49bd73e9f8410cfeb93
Submitter: Jenkins
Branch: master

commit bd6e99cf30b9f9ec6128f49bd73e9f8410cfeb93
Author: Boris Pavlovic <email address hidden>
Date: Sat Mar 28 21:00:46 2015 +0300

    Fix rally show commands for existing users in deployment

    This patch contains 3 fixes:

      1) Rally `show' commands catch properly exceptions from keystone
         and display human readble errors for Rally users.

      2) For each user his own resources should print be print.
         Before this patch table rows were summmarized (without flush)

      3) Print headers with information about which resource
         are displayed in table

    Change-Id: Ibcc2051797bf61b3a4db3a9c781ecf750ec8f3ea
    Closes-bug: #1437712