Fix: use @ONOS-VERSION instead of a hard-coded value for onos-app-election
feature.

Change-Id: I3cc61cdc8601fa82deef6b1de372107063b11446
diff --git a/features/features.xml b/features/features.xml
index 3458062..7a159f4 100644
--- a/features/features.xml
+++ b/features/features.xml
@@ -227,7 +227,7 @@
     <feature name="onos-app-election" version="1.0.0"
              description="ONOS app leadership election test">
         <feature>onos-api</feature>
-        <bundle>mvn:org.onosproject/onos-app-election/1.0.0-SNAPSHOT</bundle>
+        <bundle>mvn:org.onosproject/onos-app-election/@ONOS-VERSION</bundle>
     </feature>