updated mockito (restoring jdk 10 compatibility)

main/pom.xml

@@ -45,7 +45,7 @@
 
 		<junit.version>4.12</junit.version>
 		<junit.hierarchicalrunner.version>4.12.1</junit.hierarchicalrunner.version>
-		<mockito.version>2.11.0</mockito.version>
+		<mockito.version>2.19.0</mockito.version>
 		<hamcrest.version>1.3</hamcrest.version> <!-- keep in sync with version required by JUnit -->
 	</properties>