I0c3f14100a18107f7e416293f3d4fcc641ce5e55 introduced new logic when
extending LUKSv1 encrypted rbd volumes. As part of this qemu-img is used
to probe the rbd volume to determine the size of the LUKSv1 header.
The URI used to point to the rbd volume did not provide a user and
assumed that n-cpu/privsep would have access to the admin keyring. This
isn't always the case in most environments and would result in a failure
to probe the disk when the admin keyring wasn't available.
This change resolves this by appending the `id:$username` option to the
end of the URI provided to qemu-img using the `auth_username` found in
the connection_info from Cinder.
Closes-Bug: #1913575
Change-Id: Ia6d6dcdd7042f2aef6b3abeb5cd0f7525678a3b7
(cherry picked from commit b62a1abd61)
(cherry picked from commit 5d1adb2604)
687250f60e