Changes to get jobs working
1) After [1] devstack no longer changes the ownership of the whole
/opt/stack tree to the stack user unconditionally. Switch to the
stack user when running integration test.
2) Add bindep.txt file[2]. The default fallback file is not installed
anymore and therefore a bindep.txt file is needed to add install
additional packages.
3) Use trovestack script rather than devstack to build image so many
global variables could be used for consistency. By default, devstack
won't build image.
4) Remove the tools/test-setup.sh as it is not used any more.
5) Instance upgrade test keeps failing in CI for some reason, although
it's always passed on my local environment. In order not to block
other patches, skip the instance upgrade tests temporarily.
[1] https://review.opendev.org/203698
[2] http://lists.openstack.org/pipermail/openstack-discuss/2019-June/006888.html
Change-Id: I35e17afb9e827b1fead9d28dbf32f11ce4034a9b
7b3483723a