Merge pull request #522 from Graylog2/fix-junit-dependcy

Use explicit junit dependency

Author: mpfz0r

pom.xml

@@ -183,6 +183,12 @@
             <version>${mockito.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>${junit.version}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>