kickstart: Get rid of --ignore-missing
kickstart: Get rid of --ignore-missing

By moving ntpdate out of the hard coded list we can use the same
template for different centos/rhel versions. This can now be specified
via the generic data hash.

The --ignore-missing in the kickstart templates is a constant source of
trouble since it lets the installation fail silently.

tuxmea/opennebula-puppet-module,mattthias/opennebula-puppet-module,endocode/opennebula-puppet-module,fasrc/opennebula-puppet-module,pdrakeweb/opennebula-puppet-module,gerald1248/opennebula-puppet-module,endocode/opennebula-puppet-module,fasrc/opennebula-puppet-module,fasrc/opennebula-puppet-module,tuxmea/opennebula-puppet-module,rwaffen/opennebula-puppet-module,rwaffen/opennebula-puppet-module,pdrakeweb/opennebula-puppet-module,rwaffen/opennebula-puppet-module,arnetogo/opennebula-puppet-module,fasrc/opennebula-puppet-module,arnetogo/opennebula-puppet-module,camptocamp/opennebula-puppet-module,gerald1248/opennebula-puppet-module,arnetogo/opennebula-puppet-module,epost-dev/opennebula-puppet-module,mattthias/opennebula-puppet-module,rwaffen/opennebula-puppet-module,epost-dev/opennebula-puppet-module,epost-dev/opennebula-puppet-module,tuxmea/opennebula-puppet-module,camptocamp/opennebula-puppet-module,endocode/opennebula-puppet-module,pdrakeweb/opennebula-puppet-module,gerald1248/opennebula-puppet-module,pdrakeweb/opennebula-puppet-module,mattthias/opennebula-puppet-module,gerald1248/opennebula-puppet-module,epost-dev/opennebula-puppet-module,endocode/opennebula-puppet-module,arnetogo/opennebula-puppet-module,tuxmea/opennebula-puppet-module,mattthias/opennebula-puppet-module