mon/PGMonitor: add _bytes fields for all usage dumps

Leave the _kb ones in place for now.

Backport: firefly
Signed-off-by: Sage Weil <sage@redhat.com>
mon/PGMonitor: add _bytes perf counters

Leave the _kb ones in place for now.

Backport: firefly
Signed-off-by: Sage Weil <sage@redhat.com>
mon: remove *_kb perf counters

This is an incompatible change.

Signed-off-by: Sage Weil <sage@redhat.com>
mon/PGMonitor: remove {rd,wr}_kb from pool stat dumps

These fields are replaced with corresponding *_bytes fields.

Signed-off-by: Sage Weil <sage@redhat.com>
Merge pull request #2215 from ceph/wip-kb

mon: clean up _kb fields in json and perf counter output

Reviewed-by: John Spray <john.spray@redhat.com>