Comment 4 for bug 1719187

Reviewed: https://review.openstack.org/509791
Committed: https://git.openstack.org/cgit/openstack/magnum/commit/?id=0475a84f0e92a7a5cf83377aee5517030c070dca
Submitter: Zuul
Branch: stable/pike

commit 0475a84f0e92a7a5cf83377aee5517030c070dca
Author: Spyros Trigazis <email address hidden>
Date: Tue Sep 26 09:17:17 2017 +0000

    Fix prometheus scrape configuration

    Make prometheus configuration compatible with 1.7.3 or greater.
    The new config matches the one in the pormetheus kubernetes
    example [1] minus the configuration for ingress that we don't
    deploy.

    [1] https://github.com/prometheus/prometheus/blob/master/documentation/examples/prometheus-kubernetes.yml
    Closes-Bug: #1719187

    Change-Id: Ied8b8d8fb610e5ecba18e37f98dd1a4c9bddbf30
    (cherry picked from commit 4aade351b07e04791d6ac9aa6a1abc8bc3a8f98e)