Move rdma_ofa test set to ofa and create top level cases directory for ofa
The OFA cluster runs more than just RDMA tests, so make the test set name reflect the more generic nature of the OFA cluster.
Move the existing cases/rdma/ofa directory to cases/ofa/rdma-kernel and add a new cases/ofa index.yaml file for adding additional test cases.
Signed-off-by: Doug Ledford dledford@redhat.com