For Debian we use 'stretch-backports' image due to requirements of some
images. That means that we also have systemd from backports. This breaks
'open-iscsi' (base) and 'python-guestfs' (nova-compute) installation.
Solution is to install 'udev' and 'systemd' in proper versions.
INFO:kolla.common.utils.base:Some packages could not be installed. This may mean that you have
INFO:kolla.common.utils.base:requested an impossible situation or if you are using the unstable
INFO:kolla.common.utils.base:distribution that some required packages have not yet been created
INFO:kolla.common.utils.base:or been moved out of Incoming.
INFO:kolla.common.utils.base:The following information may help to resolve the situation:
INFO:kolla.common.utils.base:The following packages have unmet dependencies:
INFO:kolla.common.utils.base: open-iscsi : Depends: udev but it is not going to be installed
INFO:kolla.common.utils.base:E: Unable to correct problems, you have held broken packages.
INFO:kolla.common.utils.nova-compute: python-guestfs : Depends: libguestfs0 (= 1:1.34.6-2) but it is not going to be installed
INFO:kolla.common.utils.nova-compute:E: Unable to correct problems, you have held broken packages.
Closes-bug: #1769850
Change-Id: I4865c279d665cf34fc150794c01368a1602319f0
d50cc5d5d4