MB-15868: Drop non-replication eq_dcpq stats while logging dcp stats.
MB-15868: Drop non-replication eq_dcpq stats while logging dcp stats.

Also, grab dcp, tap, ckpt stats as one binary value.

Change-Id: I62f3187bdb48b12e4c68356877d3f3456204fdc6
Reviewed-on: http://review.couchbase.org/53849
Reviewed-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>
Tested-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>

ceejatec/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,membase/ns_server,membase/ns_server,ceejatec/ns_server,ceejatec/ns_server