Swift updates

* Move swift ahead of glance in upgrade order as glance depends on swiftclient
* Add some Javelin test files to swift storage
* Remove call to swift_init()
  * (re)Create cache dir
  * (re)Mount backing disk

Change-Id: I14c1d50c13563cbc5fbb71de014e318951b6f62b
Merge branch 'swift-fixes' into dt-test
Merge branch 'cinder-fix' into dt-test
Merge branch 'nova-clean' into dt-test