Update keystone module

Keystone threw some warnings after installing OpenStack Grizzly Trunk
Testing packages on Ubuntu 12.04 (LTS) and this lets the resource
provider work nonetheless.

Submodule changes to be committed:

* modules/keystone aaa8e35...0ec54b4 (7):
  > Ignore warnings before keytone's tabular output
  > Merge pull request #112 from FlaPer87/master
  > Merge pull request #111 from bodepd/level_up_test_script
  > Update README.md
  > Merge pull request #110 from bodepd/refactor_readme
  > Merge pull request #108 from aimonb/tenant_rescue
  > Merge pull request #107 from derekhiggins/https_endpoint
manage iptables rules and binat scripts
Separate Bacula client class and exported resources
More nodes added to the site
Update TODO.md