add the command `openstack account show` that lists details
about the object store account that the user authenticated
against.
Partial-Bug: #1501943
Change-Id: I1246dafee812b63a41d43be4e3598224364a2c11
this patch adds support for creating/updating and removing
properties (nee: metadata) for object store accounts.
Partial-Bug: #1501943
Change-Id: I3ed70a5d8bd8920fedb79adc60cdc602261d5eef