Moved mon.c to teh first host with mon.a and mon.b to address the issue ...

...Sage found

"... supposed to have half dumpling, half x osds.  but the steps that upgrade and restart the mons upgrade the packages on the second host (which should remain dumpling w/ osd 3,4,5)"

@liewegas Pls review
@dachary 

Signed-off-by: Yuri Weinstein <yuri.weinstein@inktank.com>