A proxy node need not be a slurm client so we don't run this role

We changed it to "all" because that's the convention we follow.
When running ansible playbook you need to limit the hosts with -l
so that it doesn't run on all hosts.

Some background on why it was set to default in the first place,
`hosts: default` is used as a placeholder during development
to indicate where actual host groups will later be defined.
You can define specific host groups within the inventory
file with names that are more relevant to your infrastructure,
replacing the "default" placeholder.

This will let us create a group_vars/proxy to override vars from
group_vars/all

This will enable a standalone VM to interact with cluster so it can act
as a proxy for services. eg. OOD,SSH etc.

Fix centos yum repo

See merge request rc/packer-openstack-hpc-image!89

Add timestamps in user date

See merge request rc/packer-openstack-hpc-image!88

Fix integration project separation

Closes #116

See merge request rc/packer-openstack-hpc-image!87

Since the job only run in schedule pipeline after !74 merged

Fix race condition

Closes #99

See merge request rc/packer-openstack-hpc-image!85

Fix(cleanup_knightly): Remove unnecessary backslash

See merge request rc/packer-openstack-hpc-image!86

fix: keep last running instance

Closes #115

See merge request rc/packer-openstack-hpc-image!84

Sleep 20 second before running test

Closes #99

See merge request rc/packer-openstack-hpc-image!83

Print out deleting image/server ID

See merge request rc/packer-openstack-hpc-image!82

Split image clean up job to integration project

Closes #114

See merge request rc/packer-openstack-hpc-image!81

Move build pipeline out to integration project

Closes #106

See merge request rc/packer-openstack-hpc-image!74

Feat autofs

Closes #113

See merge request rc/packer-openstack-hpc-image!80