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This patch adds a new parameter ``--availability-zone`` to ``openstack server unshelve`` command. This can help users to specify an ``availability_zone`` to unshelve a shelve offloaded server from 2.77 microversion. Depends-On: https://review.opendev.org/679295 Implements: blueprint support-specifying-az-when-restore-shelved-server Change-Id: Ia431e27c2a17fe16466707cc362532860ecf22df