MB-8875: Some stats tooltip to provide parameters

This commit add parameters in stat tooltip for

1) outbound XDCR stats; 2) incoming XDCR stats; 3) the last
three rows of stats in bucket stats (the summary section).

Change-Id: I980dd8d72843c7144676569c9555170c91c97054
Reviewed-on: http://review.couchbase.org/28399
Tested-by: Junyi Xie <junyi.couchbase@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>