Vasyl Saienko c69304e3d3 Do not always init compute_client when doint port list
This patch ensures that compute client is initialized only when needed
(--server arg is passed) to openstack port list command. Otherwise it
leads to failures on installations without Nova.

Change-Id: I102683461daa2f7d05dd9d7a3ec72de551c65ca9
Closes-Bug: #1688194
2017-05-04 09:44:42 -05:00
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