update pre-reqs to post M6 versions - revert DTP
diff --git a/releng/maps/dependencies.properties b/releng/maps/dependencies.properties
index 7180788..453d7b5 100644
--- a/releng/maps/dependencies.properties
+++ b/releng/maps/dependencies.properties
@@ -196,7 +196,7 @@
 # groupID : dtp
       
 dtp.mirror.prefixuri=/datatools/downloads/1.6
-dtp.file=dtp-sdk-1.6M6.zip
+dtp.file=dtp-sdk-1.6M6a.zip
 dtp.name=DTP sdk v1.6
 
 dtp.url=http://download.eclipse.org${dtp.mirror.prefixuri}