MB-16040: change compute on computeEager for is40СompatibleCell
MB-16040: change compute on computeEager for is40СompatibleCell

there are couple of places in code where is40СompatibleCell is used
a bit incorrectly like is40СompatibleCell.value instead of
is40СompatibleCell.getValue() in order to maintain the first case (.value)
we should compute is40СompatibleCell as fast as possible via computeEager

Change-Id: I8670b251b2cd03dadef9a89603051b0e8428a814
Reviewed-on: http://review.couchbase.org/54399
Reviewed-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>
Tested-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>

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