CBLT-319:  remove EE and CE and use 'enterprise' and 'community' for SGW edition param

Change-Id: Ic885df0fa28936f95345a978bd4a21d6693cca45
Reviewed-on: http://review.couchbase.org/39028
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>