engine: Upgrade openstack-sdk version to 3.0.4

ovirt-engine-3.4 should be compiled against openstack-sdk 3.0.4
to avoid mismatch in method signature (specifically quantum-model,
in NetworkForCreate.setAdminStateUp([Bb]oolean)).

Change-Id: I967cc6e3c92f2af80e5b6255e5ad279be9f65dcf
Bug-Url: https://bugzilla.redhat.com/1097658
Signed-off-by: Moti Asayag <masayag@redhat.com>