adding pip nose install so we have the option of tempest branch

* It appears that all the scenario tests are currently failing
due to tempest related issues in icehouse.  We can flip back
to stable/havana but we'll need  nose test installed from
pip. The rpm python-nose does not cover some of the requirements.

Change-Id: I15b4d59ad5a8e5c60031ddbd329f0830a99915bd