Added the vertex endcaps.

modified: compact/vertex_tracker.xml modified: src/SimpleDiskTracker_geo.cpp

compact/vertex_tracker.xml

@@ -47,8 +47,8 @@
       name="VertexSubAssembly" 
       type="DD4hep_SubdetectorAssembly" 
       vis="TrackerSubAssemblyVis">
-      <composite name="VertexTrackerEndcapN"/>
-      <composite name="VertexTrackerEndcapP"/> 
+      <composite name="VertexEndcapN"/>
+      <composite name="VertexEndcapP"/> 
       <composite name="VertexBarrel"/>
     </detector>
 
@@ -99,7 +99,7 @@
     </detector>
 
     <detector id="VertexEndcapP_ID" 
-      name="VertexTrackerEndcapP" 
+      name="VertexEndcapP" 
       type="athena_SimpleDiskTracker"
       insideTrackingVolume="true" 
       reflect="false" vis="AnlRed">
@@ -118,7 +118,9 @@
       </layer>
     </detector>
 
-    <detector id="VertexEndcapN_ID" name="VertexTrackerEndcapN" type="ref_DiskTracker"
+    <detector id="VertexEndcapN_ID" 
+      name="VertexEndcapN" 
+      type="ref_DiskTracker"
       insideTrackingVolume="true" reflect="true" vis="AnlRed">
       <position x="0" y="0" z="0"/>
       <layer id="1" vis="AnlOrange"