maven-surefire-plugin 2.15 for SUREFIRE-968 fix: show which test finished even under concurrency.

pom.xml

@@ -340,7 +340,7 @@ THE SOFTWARE.
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-surefire-plugin</artifactId>
-          <version>2.14</version> <!-- ignoring ${maven-surefire-plugin.version} -->
+          <version>2.15</version> <!-- ignoring ${maven-surefire-plugin.version} -->
           <configuration>
             <systemPropertyVariables>
               <java.io.tmpdir>${project.build.directory}</java.io.tmpdir>