Dmitry Tantsur 1e6bf0f5c0 [devstack] switch to the latest API version and OSC commands
* Use only OSC commands instead of a mix of both CLI
* Switch to "latest" API version, as we're anyway going to use it by default
* Always set resource_class to something, as it's required since Pike

As a side effect, it enabled cleaning before nodes become available.

Change-Id: I36bf8d8204b0287a862a354760071ab3bdafbabc
2017-08-11 13:03:20 +02:00
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