This adds packages to suse for systemd python linkages as well as
apache2 and which. And configures mod_proxy and mod_proxy_uwsgi with
a2enmod.
We also properly query if apache mods are enabled to avoid running
into systemd service restart limits. Enable mod_version across the board
as we use it and it may not be enabled by default (like in SUSE).
Also in addition to enabling mod_ssl we enable the SSL flag so that TLS
will work...
Finally we tell the system to trust the devstack CA.
Change-Id: I3442cebfb2e7c2550733eb95a12fab42e1229ce7
35649ae0d2