bay create is slow in gates

[Dimitry Ushakov]

Bay create in devstack gate takes about 25 minutes. More data can be found in this gist: https://gist.github.com/dimtruck/1d59b7b8d2869190ccba#file-output-sh (and surrounding log files)

High level break down: heat workflow takes about 25 minutes. Most of the time is spent in swarm_masters and swarm_nodes.

In swarm_masters and swarm_nodes:
~5 minutes in resource creation (nova, neutron, cinder)
~5 minutes in cloud-init (both cloud-init modules and heat fragments we run as part of cloud-init)
~3 minutes unaccounted for

The challenge is that due to this slowness, our test suite is limited since we hit the time constraint of 2 hours after only 2 bay-creates (accounting for devstack spin-up time)

One of the ways to expedite this is to remove the dependency for swarm_masters for swarm_nodes to make these resources execute in parallel.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/275405
Committed: https://git.openstack.org/cgit/openstack/magnum/commit/?id=08ac9a6cbac5b324747c178c4cab36296c16b567
Submitter: Jenkins
Branch: master

commit 08ac9a6cbac5b324747c178c4cab36296c16b567
Author: Corey O'Brien <email address hidden>
Date: Tue Feb 2 15:57:40 2016 -0500

    Remove minion dependency on master

    Make thhe minions work correctly without depending on the master.
    Removing this dependency decreases provisioning time by provisioning
    nodes in parallel.

    Change-Id: I025dbf54ef0cdafc4fe26acc33a9faed8cacd1ca
    Partial-Bug: 1536739
    Partial-Bug: 1551824