Upgrade to Atomix 2.0.0-raft-beta1

Change-Id: I9f3345eb0107ee0079fec8980542678ee9d6f01f
diff --git a/lib/deps.json b/lib/deps.json
index 600ac69..b584496 100644
--- a/lib/deps.json
+++ b/lib/deps.json
@@ -112,7 +112,7 @@
     "aopalliance-repackaged": "mvn:org.glassfish.hk2.external:aopalliance-repackaged:2.5.0-b32",
     "amqp-client": "mvn:com.rabbitmq:amqp-client:jar:3.6.1",
     "asm": "mvn:org.ow2.asm:asm:5.0.4",
-    "atomix": "mvn:io.atomix:atomix:2.0.0-alpha1",
+    "atomix": "mvn:io.atomix:atomix:2.0.0-raft-beta1",
     "commons-codec": "mvn:commons-codec:commons-codec:1.10",
     "commons-collections": "mvn:commons-collections:commons-collections:3.2.2",
     "commons-configuration": "mvn:commons-configuration:commons-configuration:1.10",