rollback guava version to prevent breaking cassandra persistence

Author: BrandonArp

pom.xml

@@ -114,7 +114,7 @@
     <ebean.version>6.8.1</ebean.version>
     <findbugs.annotations.version>3.0.1</findbugs.annotations.version>
     <flyway.version>3.2.1</flyway.version>
-    <guava.version>20.0</guava.version>
+    <guava.version>17.0</guava.version>
     <guice.version>4.0</guice.version>
     <hamcrest.version>2.0.0.0</hamcrest.version>
     <hikari.version>2.5.1</hikari.version>
@@ -600,6 +600,11 @@
       <artifactId>akka-cluster-sharding_${scala.version}</artifactId>
       <version>${akka.version}</version>
     </dependency>
+    <dependency>
+      <groupId>com.typesafe.akka</groupId>
+      <artifactId>akka-distributed-data-experimental_${scala.version}</artifactId>
+      <version>${akka.version}</version>
+    </dependency>
     <dependency>
       <groupId>com.typesafe.akka</groupId>
       <artifactId>akka-persistence-cassandra_${scala.version}</artifactId>