[rackspace|blockstrage] fixed mock error
Merge pull request #2215 from ehowe/fix_rackspace_mocks

[rackspace|blockstrage] fixed mock error
[vcloud_director] New & refactored XML generators.
[vcloud_director] Add #create to medias collection.
Merge pull request #2217 from nosborn/vcloud_director_media_upload

[vcloud_director] Enable media uploading
Auto-merge remote-tracking branch 'upstream/master'