glance: added missing python-oslo-serialization
glance: added missing python-oslo-serialization

Change-Id: Icc6320d155ba421ffe54036cda2e26f6e138fb68
Signed-off-by: Sorin Sbarnea <8938dff14221394d430a023580a32caf3bfb26a9@redhat.com>

redhat-openstack/octario,redhat-openstack/octario