CBLT-319:  support edition parameter aliases EE and CE

Change-Id: I48bf262e05ed38cfae1d7b3b66f5f7a143fee648
Reviewed-on: http://review.couchbase.org/39098
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>