qa/suites/rados/thrash-old-clients/workloads/rbd_cls.yaml: skip parents test
We can't (easily) build updated hammer packages, but all this sh script does
it run this one test binary with --gtest_filter arguments, so just do
it directly and skip the test explicitly here. (Newer version of the .sh
understand the environemnt variable but the hammer version does not.)
Fixes: http://tracker.ceph.com/issues/36104 Signed-off-by: Sage Weil <sage@redhat.com>