MB-100: render visualize-rebalance timeline in real scale

So that it's easy to compare different runs.

Change-Id: I08282039cf7e5fc1895f8648d5e767843d256575
Reviewed-on: http://review.couchbase.org/25002
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
MB-100: stop messing with timer_server on stats messages

Old code of killing reader or archiver is some messages handling takes
60 seconds or more was to handle mnesia issues. Given mnesia is gone,
we don't need this stuff. And I've seen timer_server at top of etop
list. After this fix it's better.

Change-Id: I3ed9f17c616930f48d73ff70289eeb8a980d90d0
Reviewed-on: http://review.couchbase.org/24618
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>