[Glance_store] RBD: On image creation error, image is not deleted

[Sergii Rizvan]

Upstream bug: https://bugs.launchpad.net/glance-store/+bug/1449639

When an exception rises while adding/creating an image, and the image has been created, this new image is not properly deleted.

The fault lies in the `_delete_image` call of the Store.add method that is providing incorrect arguments.

From glance-api log: http://paste.openstack.org/show/585313/

Steps to reproduce:
1. Download some cloud image, for example:
wget http://cloud.centos.org/centos/6.6/images/CentOS-6-x86_64-GenericCloud-1508.qcow2

2. Start creating image with glance CLI:
glance image-create --file ./CentOS-6-x86_64-GenericCloud-1508.qcow2 --disk-format qcow2 --container-format bare --progress

3. Interrupt in creating process in the middle of creation with CTRL-C:
[=====================> ] 73%^C... terminating glance client

4. Inspect /var/log/glance/glance-api.log. Exception like this http://paste.openstack.org/show/585313/
 should be captured.

Reproducibility:
 Allways.

Impact:
 The bug prevents deleting a residual image from backend when an exception rises while adding/creating an image.

Description of the environment:
MOS 7.0
1 controller
3 compute + ceph_osd
Ceph backend for glance images.

[Sergii Rizvan (srizvan)]

Here are the patches for
7.0: https://review.fuel-infra.org/#/c/27382/
6.1: https://review.fuel-infra.org/#/c/27383/

[TatyanaGladysheva (tgladysheva)]

Verified on MOS 7.0 + MU6 updates.

After updates there is no exception in /var/log/glance/glance-api.log.

[TatyanaGladysheva (tgladysheva)]

Test case is automated: https://review.gerrithub.io/#/c/300101/