Add support for django_openstack_auth

It would be useful for development, reviewing and testing to add
support for django_openstack_auth to devstack.

This change adds the integration tests to the openstack_auth
list of test: https://review.openstack.org/#/c/86528/

Change-Id: Ifbd336b83f6b2beb23996b599ec820232c13efdd
Closes-Bug: #1262121
Glance: start to use nova's glance configuration section

Commit 4b6e75b5f8037adbf63ac2f03dca17f0c8c0bc08 added support
of a neutron section. This updates the code to make use of
that section.

Change-Id: Ib9a0f2aeb0d91adeb567f79917804f0a89fdb6e1
add worlddump tool to devstack

when we exit poorly, start building a tool for doing a capture
as to why. This tool is expected to be consumed directly from
grenade as well.

Change-Id: Ia1bc1c2e259587035ca7252baceec25fa464cb82
Merge "Add support for django_openstack_auth"
Merge "Glance: start to use nova's glance configuration section"
Merge "add worlddump tool to devstack"