1.update barbican and tempest plugins links to the lastest ones
2.since we don't use launchpad to report bugs,replace it with
storyboard.openstack.org
Change-Id: I287563a7abfa57021cbdebeece35057e85691056
This change updates the README for the barbican_tempest_plugin,
removing dead links and default boilerplate text and replacing it
with basic information about the plugin.
Change-Id: I7aaaad934db89e268bd54a8d28d0e77624531022
Depends-On: I3249fb879f519da63129e0ec5117377a21094974
Implements: bp tempest-plugin