CBLT-332: If any value is supplied for the optional 5th param ( NO_PKG ),

then the downstream tasks, such as building javadocs, uploading a zip file,
and setting default values for downstream jenkins jobs, are all skipped.

Change-Id: I1681e671151cb4340e855b3f42730ac8ed881964
Reviewed-on: http://review.couchbase.org/41619
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>