Manila role CI is pretty heavy since is requires ceph with mds and
ganesha. So Creating 2 VMs on top of it usually ends up in port
creation failure, probably due to OOM (as issue is impermanent).
So to increase gates stabilty for manila role we drop most heavy test
Change-Id: Ib1f346f96a2905a02b10c96292f0833bd23ab98b
Needed-By: https://review.opendev.org/754653
08066c1818