snapshot_create_as: Add fs-freeze to/for acl list

Using the --quiesce option requires the 'fs-freeze' acl/permission, so
add it to the action_id value. I tried adding it "just" to the quiesce
specific test to no avail seems the value in
Merge pull request #206 from jferlan/snapshot_create_as_acl

snapshot_create_as: Add fs-freeze to/for acl list