The ServiceTest.test_start_specific under the ceph osd tests stops all
services using ceph-osd.target. This will stop all the OSDs, but the
restarting of any single OSD will restart all the OSDs. This behavior
causes the charm test to fail.
Unfortunately, this wasn't caught in the initial review because the test
is skipped when there are fewer the 2 OSDs on a unit and the final test
run skipped the test due to this condition.
Fixes#542
Signed-off-by: Billy Olsen <billy.olsen@gmail.com>