Enable usage of config-drive for file injection

* Some nova deployments allow the use of config-drive to do file
  injection.  Trove, when booting an instance, needs to send this
  to Nova when config-drive is to be used.

Closes-Bug: #1329535

Change-Id: I950b93a32f6c7224f30cf930e5f95710c07cbc26
Remove setuptools_git requirement

PBR replaces what this does.

Change-Id: Id523888a65a31a7e7a31a4edc4602c9c2600b000
Fixes redundant get call in a few places

partially implements: blueprint refactoring-datastore-options-in-cfg

Change-Id: Ib4257abc44f7166b014c9963995ff0741758e723
Merge "Remove setuptools_git requirement"
Imported Translations from Transifex

Change-Id: I46ee927c685218dfc40fe2134de884ead452e32a
Merge "Fixes redundant get call in a few places"
Merge "Imported Translations from Transifex"
Merge "Enable usage of config-drive for file injection"