Disabling the build isolation breaks installing gnocchi, which
results in telemetry tests failing on stable branches as well
as the grenade test failing for ceilometer on master.
Conflicts:
inc/python
Change-Id: I00f504b80d087072a32e0e64e46b7dff4b2ff683
Signed-off-by: Jaromir Wysoglad <jwysogla@redhat.com>
(cherry picked from commit 58e156c2cd)