Comment 1 for bug 1442630

Reviewed: https://review.openstack.org/172096
Committed: https://git.openstack.org/cgit/stackforge/os-ansible-deployment/commit/?id=954f8ff8cb4a57fbf68781cf51bce37a9a3a10e3
Submitter: Jenkins
Branch: master

commit 954f8ff8cb4a57fbf68781cf51bce37a9a3a10e3
Author: Jesse Pretorius <email address hidden>
Date: Thu Apr 9 15:46:30 2015 +0100

    Add AIO diagnostics and better gate scripts consistency

    Implements extra diagnostic information for gate check failure analysis and
    also appends DNS settings instead of replacing them for the AIO bootstrap.

    Some extra settings are added to the DNS to try to catch edge cases for DNS
    resolution. The DNS `resolv.conf` was being overwritten on every run using
    google name servers however we need to add google name servers to the existing
    resolver not overwrite the whole conf so a conditional was added.

    The gate scripts were attempting to create a symlink to logs on every run.
    While this is fine for the gate which is creates a new node on every run
    the link will cause failures on recheck when doing more local testing.

    The ansible log entry was being appended to the `ansible.cfg` file on every
    run which should also be limited to one entry. The conditional added is
    helpful when doing local testing with the gate scripts.

    Closes-Bug: #1442630
    Change-Id: I25aac98d7408ba32f94befea22da4471bd1697b6