Check and gate PEP8 for stackforge/gerrit-dash-creator

Add the job gate-gerrit-dash-creator-pep8 to the repository
stackforge/gerrit-dash-creator to check for PEP8/Hacking issues
after pushing/before merging an review request.

Change-Id: I8628077da60309d2ac081653551de6c053470768
Merge "Check and gate PEP8 for stackforge/gerrit-dash-creator"