upload-to-image doesn't recognize image name

[Andrew Kerr]

This is using devstack (icehouse)

When attempting to upload a volume to image store, it always fails stating the following:

**
ERROR: No image_name was specified in request. (HTTP 400)
**

However, the image name is properly specified in the request:

**
cinder upload-to-image ffcea321-93ed-41e5-ba0c-87abcfdf67ce myImage
**

The following is from the debug output and you can see that the name is not being included in the REST request:

REQ: curl -i http://192.168.10.11:8776/v2/7303878369c7457da7e02f05640e8fb5/volumes/ffcea321-93ed-41e5-ba0c-87abcfdf67ce/action -X POST -H "X-Auth-Project-Id: demo" -H "User-Agent: python-cinderclient" -H "Content-Type: application/json" -H "Accept: application/json" -H "X-Auth-Token:<TOKEN REMOVED>" -d '{"os-volume_upload_image": {"container_format": "bare", "force": false, "image_name": null, "disk_format": "raw"}}'

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/70154