Update with RAP 2.0 M1a contribution

RAP 2.0 M1a contains the expected negated p2 requirements defined on
bundle level. In addition to that I removed the inheritance from the
RuntimeOnly validation set because the CommonSet contains too much...

The validation fails now with a javax.xml.parsers missing requirement.
At least this is consistent with everything else.
diff --git a/rap.b3aggrcon b/rap.b3aggrcon
index 0d27aaf..3e5e271 100644
--- a/rap.b3aggrcon
+++ b/rap.b3aggrcon
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="ASCII"?>
 <aggregator:Contribution xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:aggregator="http://www.eclipse.org/b3/2011/aggregator/1.1.0" label="RAP">
-  <repositories location="http://download.eclipse.org/rt/rap/2.0/M1-20120821-1934/" description="RAP 2.0 Runtime Repository">
+  <repositories location="http://download.eclipse.org/rt/rap/2.0/M1a-20120912-1436/" description="RAP 2.0 Runtime Repository">
     <features name="org.eclipse.rap.feature.feature.group" versionRange="[2.0.0,2.1.0)">
       <categories href="simrel.b3aggr#//@customCategories[identifier='EclipseRT%20Target%20Platform%20Components']"/>
     </features>
diff --git a/simrel.b3aggr b/simrel.b3aggr
index 5f0b6c0..cf6c5c1 100644
--- a/simrel.b3aggr
+++ b/simrel.b3aggr
@@ -77,7 +77,7 @@
       </repositories>
     </contributions>
   </validationSets>
-  <validationSets description="Collection of contributions (features) that should not be installed into an IDE, but into runtime targets only." label="RuntimeOnly" extends="//@validationSets[label='CommonSet']">
+  <validationSets description="Collection of contributions (features) that should not be installed into an IDE, but into runtime targets only." label="RuntimeOnly">
     <contributions href="rap.b3aggrcon#/"/>
   </validationSets>
   <configurations/>