Upgrade junit to 4.12

Change-Id: I95641307653e1674893e71d77881c3cf94678488

pom.xml

diff --git a/pom.xml b/pom.xml
index ae2d70f..2234fa6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -484,7 +484,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.11</version>
+      <version>4.12</version>
       <scope>test</scope>
     </dependency>