MB-8066 Compactor should only evict bodies on request

Change-Id: I476bd3994dc65618af3db478c2fd74381fc4c003
Reviewed-on: http://review.couchbase.org/26504
Reviewed-by: Filipe David Borba Manana <fdmanana@gmail.com>
Tested-by: Aaron Miller <apage43@ninjawhale.com>
Merge remote-tracking branch 'origin/2.0.2'

* origin/2.0.2:
  MB-8066 Compactor should only evict bodies on request

Change-Id: Ica37496be4246fce2c7b2dfbc34e5fc5ec889c21