MB-8028: updated copyright at footer

Change-Id: I1ed9d4818d37a27c596113d17e9b1b29b43b6022
Reviewed-on: http://review.couchbase.org/25695
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>