Repos configured with tripleo-repos are not honoured in tripleo-build-containers-centos-7 job

[yatin]

The repos configured with tripleo-repos[1] are not honoured in tripleo-build-containers-centos-7 job, The default repos are used[2], The issue is in kolla-build config param[3], it should be "rpm_setup_config"

[DEFAULT]
base=centos
type=binary
namespace='master'
registry=127.0.0.1:8787
tag=latest
template_override=/home/zuul/src/git.openstack.org/openstack/tripleo-common/container-images/tripleo_kolla_template_overrides.j2

------------
rpm_setup=http://localhost/delorean.repo,http://localhost/delorean-deps.repo <<- The parameter should be rpm_setup_config(not rpm_setup)
----

Example logs:- http://logs.openstack.org/14/633014/2/check/tripleo-build-containers-centos-7/ade6032/

[1] https://github.com/openstack-infra/tripleo-ci/blob/master/playbooks/tripleo-buildcontainers/pre.yaml#L63-L66 (see rpm_setup option in kolla-build.conf)
[2] From logs:- curl -L https://trunk.rdoproject.org/centos7/current-passed-ci/delorean.repo -o /etc/yum.repos.d/delorean.repo, curl -L https://trunk.rdoproject.org/centos7/delorean-deps.repo -o /etc/yum.repos.d/delorean-deps.repo
[3] https://github.com/openstack/kolla/blob/453ad6ca43dea18a48f7baf9197ba917056813cb/kolla/common/config.py#L277

[Alex Schultz (alex-schultz)]

https://review.openstack.org/#/c/633527/

[yatin (yatinkarel)]

rpm_setup_config is correctly set in kolla-build.conf after https://review.openstack.org/#/c/633527/.