anaconda: reset all services to default state

Some preset files may be installed when actual services are already
enabled/disabled. To not worry about package installation order, simply
reset all the services to default state when all the packages are
installed.

Fixes QubesOS/qubes-issues#2049

anaconda/data/post-scripts/60-systemd-preset.ks

@@ -0,0 +1,9 @@
+%post
+
+# preset all services, to not worry about package installation order (preset
+# files vs services)
+systemctl preset-all
+
+systemctl enable initial-setup.service
+
+%end

anaconda/data/post-scripts/Makefile.am

@@ -18,5 +18,5 @@
 # Author: Chris Lumens <clumens@redhat.com>
 
 postscriptsdir = $(datadir)/$(PACKAGE_NAME)/post-scripts
-dist_postscripts_DATA = 40-qubes-alt-kernels.ks 50-qubes.ks 80-setfilecons.ks 90-copy-screenshots.ks 99-copy-logs.ks
+dist_postscripts_DATA = 40-qubes-alt-kernels.ks 50-qubes.ks 60-systemd-preset.ks 80-setfilecons.ks 90-copy-screenshots.ks 99-copy-logs.ks
 MAINTAINERCLEANFILES = Makefile.in