CLI Reference: Regenerate glance commands (incl. v2)

Regenerate with fixed openstack-auto-commands to document also v2
commands. Now v1 and v2 are in two different sections.

Change-Id: I378b3c8a9fd8691c504e85cd8b850672a6ee09b0
Partial-Bug: #1367430
Merge "CLI Reference: Regenerate glance commands (incl. v2)"