Update oncall rotation file

Change-Id: Ia8304b4056056a569e853e8513fbef7dcbe802de
diff --git a/tooldata/data/oncall.v1.xml b/tooldata/data/oncall.v1.xml
index 77b63d8..1a862c0 100644
--- a/tooldata/data/oncall.v1.xml
+++ b/tooldata/data/oncall.v1.xml
@@ -4,7 +4,7 @@
 -->
 <rotation>
   <shift>
-    <primary>kash</primary>
+    <primary>rthellend</primary>
     <secondary>jingjin</secondary>
     <startDate>Apr 04, 2016 08:00:00 AM</startDate>
   </shift>