changes to the config_repos role so hopefully we can upgrade cleanly without reinserting the base repos

Remove -a to make the check_fs_used work

See merge request !156

Refer to https://github.com/mej/nhc

Do not enabled slurmctld and slurmdbd in systemd

See merge request !155

Make slurmctld and slurmdbd explicitily disabled on startup (rather than just leaving it to whatever it is currently set to)

fix an error detecting the ppolicy and enable the auxposixgroup schema

See merge request !154

Fix nat server

See merge request !153

Merge branch 'master' of gitlab.erc.monash.edu.au:hpc-team/ansible_cluster_in_a_box into fix_nat_server

Fix nat server to point iptables to use correct public interface name

- template the public interface so NAT Masquerade command goes to right interface
- public inteface name autogenerated by looking at route to 8.8.8.8
- ACCEPT command for private interface modified to use network CIDR. THis is hardcoded to M3 if not defined, so no impact on cluster_in_a_box roles. (Monarch and others will need to pass it as a parameter)
- Not sure if ACCEPT on private interface is used, as compute nodes point to mlx0 interface for routing

Fixed xorg.conf.j2 template

See merge request !150

added gpu role to generate combinations of xorg.conf

See merge request !149

added check_nvidia_uvm.nhc

See merge request !148

Better reboot

See merge request !147

added dependency on gluster so slurmctl will not start until gluster is running

See merge request !146

Removing ipa package

See merge request !145

enable the client quorum as wel

See merge request !144

add the gluster quorum

See merge request !143

Adding new NHC for xorg.conf so that vglrun works on vis nodes

See merge request !141

finally corrected the cuda collectd script

See merge request !140

Remove unused fan_speed monitoring, add monitoring of memory and gpu utilization

See merge request !139