rbd: remove kernel rbd test from rbd suite

It's already present in the kernel suite.
upgrade/rgw-double: start rgw
upgrade/rgw: mds restart order doesn't matter
upgrade/rgw: use bobtail s3tests
kernel: test o_trunc

Signed-off-by: Sage Weil <sage@inktank.com>
fs: add o_trunc test on ceph-fuse

Signed-off-by: Sage Weil <sage@inktank.com>
rbd: reeanble iozone test, just to see

See #2689
test_o_trunc.sh moved
kernel: simple_1tb -> simple_big

1TB is too big for plana