CBLT-309:  keep separate build logs for community and enterprise builds,
           Skip building javadocs if edition is community.

Change-Id: Idfde6154b5c4777761e932816221a8a1d485b4b0
Reviewed-on: http://review.couchbase.org/37735
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>