Merge "Use glance to list images"

diff --cc functest/tests/unit/utils/test_openstack_snapshot.py
Simple merge

diff --cc functest/tests/unit/utils/test_openstack_utils.py
Simple merge

diff --cc functest/utils/openstack_clean.py
Simple merge

diff --cc functest/utils/openstack_snapshot.py
Simple merge

diff --cc functest/utils/openstack_utils.py
Simple merge