1. Downgrade ingress controller for MariaDB
Current MariaDB charts [1] do not support the latest
nginx ingress controller, e.g. Vts related parameters
were removed in June [2] from the controller.
An updated version matches the version that is configured
in mariadb chart by default.
[1] https://github.com/openstack/openstack-helm-infra/blob
/6a1a46a8ce390fd5d5fa5736796f5747874ce1fb/mariadb/files/nginx.tmpl
[2] https://github.com/kubernetes/ingress-nginx/commit
/63b38e1c21e6486607ac4485161f88663d6ef5a9
2. Specify rally test version for heat, default version
is not compatible with test scripts in htk.
Change-Id: I58ae26dd7de4bada98f940a4d2030f38e54ba4a0
0cc58150d7