ClusterService implementation that relies on accrual failure detector for determining node up/down status.
Initially off by default, until futher testing is done.

Change-Id: I0ac8850d76af717e7804d4503bedb227d5894a0a
diff --git a/core/store/dist/pom.xml b/core/store/dist/pom.xml
index 2f0f977..ead1ab0 100644
--- a/core/store/dist/pom.xml
+++ b/core/store/dist/pom.xml
@@ -32,6 +32,13 @@
     <description>ONOS Gossip based distributed store subsystems</description>
 
     <dependencies>
+
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-math3</artifactId>
+            <version>3.2</version>
+        </dependency>
+
         <dependency>
             <groupId>org.onosproject</groupId>
             <artifactId>onos-core-serializers</artifactId>