synch up and cleanup to add 'datatools'

releng.control/commonComputedVariables.shsource

@@ -52,6 +52,8 @@ export RELENGSERVERTOOLS=webtools.maps/releng.servertools
 export RELENGSOURCEEDITING=webtools.maps/releng.sourceediting
 export RELENGWEBSERVICES=webtools.maps/releng.webservices
 
+export RELENGDATATOOLS=webtools.maps/releng.datatools
+
 # top most directory not used .. it's hard to, since projects 
 # use different branches.
 #export RELENGMAPS=webtools.maps