Update the "os availability zone list" command to support listing
volume availability zones along with the currently listed compute
availability zones. This adds a --compute and --volume option to
the command in order to select the availability zones to list. By
default, all availability zones are listed.
If the Block Storage API does not support listing availability
zones then an warning message will be issued.
Change-Id: I8159509a41bd1fb1b4e77fdbb512cf64a5ac11a9
Closes-Bug: #1532945
Refactor the "os availability zone list" command to make it a common
command instead of a compute-only command. Since availability zones
are common to compute, volume and network (new), this refactoring
allows availability zone support to be added for volume and network.
In addition to the refactor, unit and functional tests were added.
Change-Id: I63e9d41d229b21cd38e5a083493042c096d65e05
Partial-Bug: #1532945
