Releases of OpenStack SDK on PyPI will soon switch to the 1.*.* series
which our stable/1.0.0 branch is incompatible with. Previously, in
commit 0f532d10f3, several jobs have been changed to run on master
branch only.
This patch adds siblings jobs for our stable/1.0.0 branch which
pull the latest SDK releases of the 0.*.* series from PyPI instead.
Ref.: 0f532d10f3
Change-Id: Iefc6acfa4c25eb5d9ab062a3bfa655be2188cb77