Goutham Pacha Ravi 733fcfe0fb Fix test variable injection in CI
* Migration is not a multi-backend only feature.
* Snapshot tests, Shrink tests and Quota test flags
  should have appropriate devstack variables.

Closes-Bug: 1652150

Change-Id: I7a83981045c03bcc605ec0119a4b425fb5f9e987
2016-12-27 16:39:27 -08:00
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2016-12-27 16:39:27 -08:00