Make stack.sh work on SUSE

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
diff --git a/files/rpms-suse/general b/files/rpms-suse/general
index 1044c25..370f240 100644
--- a/files/rpms-suse/general
+++ b/files/rpms-suse/general
@@ -1,3 +1,5 @@
+apache2
+apache2-devel
 bc
 bridge-utils
 ca-certificates-mozilla
@@ -23,9 +25,11 @@
 python-devel  # pyOpenSSL
 python-xml
 screen
+systemd-devel # for systemd-python
 tar
 tcpdump
 unzip
 util-linux
 wget
+which
 zlib-devel