Comment 4 for bug 1817963

Reviewed: https://review.openstack.org/639874
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=1241e3ec2a93b94d019ebaed8d5086d4622e6cc4
Submitter: Zuul
Branch: master

commit 1241e3ec2a93b94d019ebaed8d5086d4622e6cc4
Author: Matt Riedemann <email address hidden>
Date: Wed Feb 27 19:53:34 2019 -0500

    Stop using "nova" in API samples when creating a server

    The "availability_zone" parameter for server create in the
    API reference and the availabilty zone user docs both say
    that users should not use the default availability zone (nova)
    yet our server create API samples use "nova" which is...bad.

    This change fixes the API samples and related tests to use
    a fake "us-west" availability zone. For any samples that were
    requesting an AZ when creating a server, those are changed from
    requesting "nova" to requesting "us-west" and a new
    AvailabilityZoneFixture is added to stub out the code used to
    validate the requested AZ and what is shown in server detail
    responses.

    Some unused samples are removed from the os-availability-zone
    directory and the API reference and AZ user docs are updated for
    formatting and linking to other docs for reference.

    Change-Id: I3161157f15f05a3ffaaf1b48e7beb6b3e59c5513
    Closes-Bug: #1817963