This supports ext4 partitions with metadata_csum(as created
by ubuntu bionic by default).
Also Using it with the e1000 virt driver cirros sees the nics.
This allows us to remove 2 of the special cases we had inserted
when the CI jobs were switched to bionic.
Change-Id: I68165110dd57ed314cbc29430f84ff5092065d38
Story: #2004604
Task: #28570
Task: #28499
Instead, use the common_settings file to source all the variables
we need at the early stages of devstack setup and during the upgrade
itself. This also fixes an issue with the networking-generic-switch
upgrade script, which is run from the old release instead of the new
one.
It depends on a patch from an older release, as grenade is setup
using settings from an older release, we need common_setting to be
populated there.
Change-Id: I0d6d3e9e60785bb9b6a10c8c7a07867a5b2a5e6e
Depends-On: I34fb68c150b753824bd2687a1f522ac87771a5e3