To Reproduce Steps to reproduce the behavior:

1. Creae an audit with the Zone migration strategy with storage_pools defined, but no compute_nodes and with_attached_volume=True crahses. Here is an example audit:

   openstack optimize audit create -a zm_test -p storage_pools='[\{"src_pool": "jgilaber-watcher-2@lvmdriver-1#lvmdriver-1", "src_type": "lvmdriver-1", "dst_type": "lvmdriver-1", "dst_pool": "jgilaber-watcher-3@lvmdriver-1#lvmdriver-1}]' -p with_attached_volume=True

Expected behavior

• The audit produces an action plan with the volume migrations that match the input. Instead the audit fails because of the misssing compute_nodes in the input

Bug impact

• A valid audit is failed because of an unnecessary parameter.

Known workaround

• If the user has a preferred destination node for the migrated instances, the parameter can be specified.