first pass of upr -> dcp rename

This renames everything except module names and stats.

Change-Id: I33141a4e7615d4827918db769095c54e80ac682a
Reviewed-on: http://review.couchbase.org/39762
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>