qa/workunits/mon/crush_ops: use expect_false

Signed-off-by: Sage Weil <sage@inktank.com>
mon/OSDMonitor: disallow crush buckets of type 0

Prevent creation of buckets of type 0 ('osd', 'device', etc.), as they
will confusing the mapping algorithm.

Signed-off-by: Sage Weil <sage@inktank.com>
test: merge unittest_crushwrapper and unittest_crush_wrapper

Signed-off-by: Sage Weil <sage@inktank.com>
Merge pull request #1378 from ceph/wip-7487

mon: no crush buckets with type 0 (#7487)

Reviewed-by: Greg Farnum <greg@inktank.com>