Upgrade to Atomix 2.0.0-raft-beta1

Change-Id: I9f3345eb0107ee0079fec8980542678ee9d6f01f
diff --git a/core/store/primitives/pom.xml b/core/store/primitives/pom.xml
index ee89881..1622751 100644
--- a/core/store/primitives/pom.xml
+++ b/core/store/primitives/pom.xml
@@ -70,7 +70,7 @@
         <dependency>
             <groupId>io.atomix</groupId>
             <artifactId>atomix</artifactId>
-            <version>2.0.0-alpha1</version>
+            <version>2.0.0-raft-beta1</version>
         </dependency>
 
         <dependency>