jobs: Tell scap to use the current user to access docker
After deployment of
https://gerrit.wikimedia.org/r/c/operations/puppet/+/1081281 the
/etc/scap.cfg
will contain docker_user: mwbuilder
.
Ensure the publishMWSingleVersion job uses the current runtime user to
access docker instead of mwbuilder
which doesn't exist on the releases
hosts.