Monitor: make all commands be careful about stdout vs stderr

Status messages go to stderr, success or failure
Output data goes to stdout
Keep them separated

Affected commands include:

auth list
auth export <name>
auth get-or-create-key
mds stat
mds compat show
fsid
health
quorum_status
mon_status
heap *
mon stat
JSON output of:
        osd dump
        osd tree
        osd ls
        osd getmap
        osd getcrushmap
osd getmaxosd
osd map <pool> <obj>
osd lspools
osd create

Signed-off-by: Dan Mick <dan.mick@inktank.com>