[vcloud_director] Fix listing catalog items when only a single item exists.
[vcloud_director] Move ensure_list to VCloudDirector::Collection.
Replace inline wrap implementations in Tasks and Organizations with
ensure_list.
[rackspace] updating to only parse json if the body of the response has data
Merge pull request #2169 from rackspace/no_body

[rackspace] updating to only parse json if the body of the response has data
[rackspace] remove deprecated response block from request
[openstack|storage] remove deprecated response block from request
Merge pull request #2173 from burns/remove_deprecated_block_os

[openstack|storage] remove deprecated response block from request
[vcloud_director|tests] Remove vcr_cassettes_old/
[vcloud_director|tests] Don't hardcode API host.
[vcloud_director|tests] mv *_test.rb *.tests.rb
[vcloud_director|tests] Make tests work
[vcloud_director|tests] Remove and ignore vcr_cassettes/
Merge pull request #2172 from burns/remove_deprecated_block

[rackspace] remove deprecated response block from request
Merge pull request #2176 from nosborn/vcloud_director_tests

[vcloud_director|tests] Fixes and cleanup
Merge pull request #2155 from rsalm/vcloud_director_catalog_items_fix

[vcloud_director] Fix listing catalog items when only a single item exists