Mark Goddard 2a69050e37 Append to kolla user groups in bootstrap-servers
This makes the bootstrap-servers command more idempotent, since without
the append argument set the kolla user will be removed from the docker
group before being added to it again in a later task.

TrivialFix

Change-Id: Iab0f6b5e18a103e9140631ee3ebbbb48c490bc24
2018-07-09 19:05:24 +01:00
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