Revert "mon: implement safety interlock for deleting pools"

This reverts commit c993ac9b1fa4037f4cc2674455728ee38a7c978b.

This is too hard to test.  Requiring the pool name twice along with
--yes-i-really-really-mean-it should be sufficient.

Signed-off-by: Sage Weil <sage@inktank.com>
mon: safety interlock for pool deletion

Require that the pool name be passed twice along with an force option
before we irreversibly delete an entire pool of objects.

Signed-off-by: Sage Weil <sage@inktank.com>
qa/workunits/rbd/copy.sh: use non-deprecated --image-format option

--format is deprecated.

Signed-off-by: Sage Weil <sage@inktank.com>
qa: fix mon pool_ops workunit

Use ! for clarity when commands are supposed to fail.
Check a few other cases that should fail, and correct deleting
non-existent pools.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
ceph, rados: update pool delete docs and usage

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
doc: update ceph man page link

It's not the wiki anymore, and the man page needed to be regenerated.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
Merge branch 'wip-pool-delete'

Reviewed-by: Josh Durgin <josh.durgin@inktank.com>