Since the commit the remove AMI snapshot format special casing
has merged, we're now running the libvirt snapshot tests as expected.
However, for those tests qemu-img binary needs to be installed.
Because these tests have been silently and incorrectly skipped for so long,
they didn't receive the same maintenance as other tests as the failures went unnoticed.
Change-Id: Ia90eedbe35f4ab2b200bdc90e0e35e5a86cc2110
Closes-bug: #2075178
Signed-off-by: Julien Le Jeune <julien.le-jeune@ovhcloud.com>
(cherry picked from commit 0809f75d7921fe01a6832211081e756a11b3ad4e)