task modified to include a '-' before the test script

Signed-off-by: tamil <tamil.muthamizhan@inktank.com>
Merge branch 'next' of github.com:ceph/ceph-qa-suite into next
Merge branch 'next' of github.com:ceph/ceph-qa-suite into next
added rgw task before swift

Signed-off-by: tamil <tamil.muthamizhan@inktank.com>