CBD-1431:  also look for property named LICENSE

Property name was chaned from LICENSE to EDITION, but existing builds
do not have the new property name. Check for either until enough
build history makes this moot.

Change-Id: Ib42eb3c7e753ac7dd07af5ee21bed13683ba2b52
Reviewed-on: http://review.couchbase.org/40793
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>