Upgrade to Atomix 2.0.9
- Fix UnknownSessionExceptions
- Fix OutOfDirectMemoryErrors
- Ensure leader timeout is recurring
- Fix exceptions thrown during Raft startup communication
- Ensure sessions are only expired by leaders once

Change-Id: I856cb0840b3b609f5a3481567a4c367c8e6c9aae
diff --git a/core/store/primitives/pom.xml b/core/store/primitives/pom.xml
index ac5c025..a546cfe 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>2.0.8</version>
+            <version>2.0.9</version>
         </dependency>
 
         <dependency>