Upgrade to Mockito 2.4.0

Author: joschi

pom.xml

@@ -102,7 +102,7 @@
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-core</artifactId>
-            <version>2.1.0-RC.1</version>
+            <version>2.4.0</version>
             <scope>test</scope>
         </dependency>
     </dependencies>