Add image names to glance command arguments.

Now a user should specify ID as an image by glance command, and I feel
it is easy-use that a user can specify name also as an image like nova
command(ex. "nova boot").

By applying this patch, a user can specify name as image like the
following examples:

$ glance image-show cirros-0.3.0-x86_64-uec
$ glance image-update --name root-fs cirros-0.3.0-x86_64-uec
$ glance image-delete cirros-0.3.0-x86_64-uec
$ glance image-download cirros-0.3.0-x86_64-uec
$ glance member-create cirros-0.3.0-x86_64-uec 94b0e63a27ca43348fe056622fe3fe94
$ glance member-delete cirros-0.3.0-x86_64-uec 94b0e63a27ca43348fe056622fe3fe94

Fixes bug 1093380

Change-Id: Ia0a070eed6ae3853ef02032f479087edb1d75a67
Merge "Add image names to glance command arguments."