Use latest surefire

Older versions trim stack trace by default, and we weren't even
using a full release.

Author: headius

pom.xml

@@ -111,7 +111,7 @@
         </plugin>
         <plugin>
           <artifactId>maven-surefire-plugin</artifactId>
-          <version>3.0.0-M5</version>
+          <version>3.1.2</version>
         </plugin>
         <plugin>
           <artifactId>maven-jar-plugin</artifactId>