gnocchi when configured with swift will require keystone
to be available to authenticate to migrate to v3. At this
step keystone is not available and gnocchi upgrade fails
with auth error. Instead start apache in step 3, start
apache first and then run gnocchi upgrade in a separate
step and let upgrade happen here.
Closes-Bug: #1634897
Change-Id: I22d02528420e4456f84b80905a7b3a80653fa7b0