testing: adding a Hadoop wordcount test

Signed-off-by: Joe Buck <jbbuck@gmail.com>
Reviewed-by: Sam Lang <sam.lang@inktank.com>
test: correcting hadoop-internal tests

Changing the hadoop-internal tests to use the
newly added $TESTDIR environment variable.
Also, removed unneeded variables.

Signed-off-by: Joe Buck <jbbuck@gmail.com>
Reviewed-by: Sam Lang <sam.lang@inktank.com>
rbd: udevadm settle before unmap

udev runs blkid on device close, and other such nonsense that can
make unmap fail with EBUSY.  Settle before we unmap to avoid this if
possible.  See #4183.

Closes: #4186
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
qa: mon/workloadgen.sh: drop TEST_CEPH_CONF code

The binaries already pick up on CEPH_CONF, which will be set as needed.

Signed-off-by: Sage Weil <sage@inktank.com>
qa: test_mon_workloadgen: use default config file path

I'm not sure why we wouldn't.  Also, this makes this test work without
annoying plumbing to pass the explicit path through.

Signed-off-by: Sage Weil <sage@inktank.com>
Merge git://github.com/ceph/ceph