Remove python tests from check and gate for storyboard.

Storyboard is a Django app. Django requires different gate tests than
other OpenStack repos. Until a patch is applied to apply the proper
Django tests in the check and gate, the Python tests are removed for
storyboard.

Change-Id: I45767c4a3abbe9e6846fd54baba29c7028e0cec7
Merge "Remove python tests from check and gate for storyboard."