Upgrade to Maven Surefire Plugin 2.19

Release notes:

https://mail-archives.apache.org/mod_mbox/maven-announce/201510.mbox/%3CCAKuVzBRpxiVrO8RFCPsEiPn%2BJEKKgO-fDz2G01q%2B5j5dz5RzAA%40mail.gmail.com%3E

pom.xml

@@ -173,7 +173,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.18.1</version>
+        <version>2.19</version>
         <configuration>
           <parallel>all</parallel>
           <threadCount>1</threadCount>