Comment 2 for bug 1430976

Reviewed: https://review.openstack.org/163901
Committed: https://git.openstack.org/cgit/openstack/designate/commit/?id=b597b2c280ed354bcc47139c0ff34519f3b2844d
Submitter: Jenkins
Branch: master

commit b597b2c280ed354bcc47139c0ff34519f3b2844d
Author: Tim Simmons <email address hidden>
Date: Thu Mar 12 15:52:56 2015 +0000

    Smarter Create/Delete in BIND9/Agent

    * In BIND9, an rndc addzone fails if the zone already exists,
      similarly, a delzone fails if the zone doesn't exist. This
      patch catches that in the output from the RNDC call, and allows
      the Pool Manager to realize success in the above situation.

    * In the Agent, we must take action (write a zone file, for example)
      before we execute the addzone/delzone. So we check with an SOA query
      before the backend is called.

    Partial-Bug: 1430976
    Change-Id: I0430c3a402ae30d5705bbfef1a4394772cbc12f9