mon: unregister command on shutdown

[renhwztetecs]

unregister command on shutdown
include: "quorum enter" && "quorum exit"

Signed-off-by: huanwen ren ren.huanwen@zte.com.cn

[xiexingguo]

So hard working you are:-)

[songbaisen]

It is really work hard.

[jecluis]

@renhwztetecs changes look fine.

Let me nit pick the commit message though. It would be great if you could adjust it to be a bit more comprehensible. Instead of mon:lack of unregister of object in shutdown(), something like mon: Monitor: unregister command on shutdown would be perfect.

[renhwztetecs]

@jecluis
hmm,before the description is more redundant, I change it
Thanks a lot for your advice

[liewegas]

More nit picking:

• there is always a space after a colon
• mon: Monitor: is redundant... just "mon: unregister command on shutdown" is sufficient

[renhwztetecs]

@liewegas
after you remind, I noticed the colon need a space.
Thank you for your careful guidance, I have changed it