GitLab

Add CI testing of changes

See merge request !123

Also do not run mail-frontend setup on non-mail test envs.

Useful for debugging.

Rather than using submodules, we pull dependencies on-demand on every
CI job.

Since auth-server is now part of the low level infra, it no longer
exists as a float service, so we have to manually create its LDAP
credentials.

We don't authenticate to rest-server/backup, so accept 401 as valid.

ai3-prober: don't follow redirect and add http probe

See merge request !122

Filter out missing ip6

See merge request !121