Don't run heat tempest tests by default until they're fixed.
Most of them currently fail, it seems, they are incompatible
with the latest gabbi.
The patch fixes 'All tasks should be named' linters error.
and bumps version of the linters which includes a fix for
the linters issue:
ImportError: cannot import name 'render_group'
Install python-manilaclient from source so that it contains
latest (not yet packaged) changes.
Change-Id: Idd9180ecbe396f73a03922982a4e005a84a77d02
30c7a1301d