Stop running puppet centos-7 jobs on infra puppet
We don't deploy on centos 7 anymore so don't need these jobs (and this
one is failing).
check:
queue: system-config
jobs:
- - legacy-puppet-openstack-infra-spec-helper-unit-centos-7
- legacy-puppet-openstack-infra-spec-helper-unit
gate:
queue: system-config
jobs:
- - legacy-puppet-openstack-infra-spec-helper-unit-centos-7
- legacy-puppet-openstack-infra-spec-helper-unit
- project:
