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
Matt Riedemann