upgrade junit and assertj

pom.xml

@@ -118,13 +118,13 @@
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
-        <version>4.11</version>
+        <version>4.12</version>
         <scope>test</scope>
       </dependency>
       <dependency>
         <groupId>org.assertj</groupId>
         <artifactId>assertj-core</artifactId>
-        <version>1.7.0</version>
+        <version>1.7.1</version>
         <scope>test</scope>
       </dependency>
       <dependency>