Merge pull request #112 from whitingjr/add-jvm-flag-for-surefire-tests-with-jdk11

Add jvm flag to permit attaching to JVM during tests.

Author: ligangty

pom.xml

@@ -174,6 +174,7 @@
             <redirectTestOutputToFile>true</redirectTestOutputToFile>
             <forkCount>${test-forkCount}</forkCount>
             <reuseForks>false</reuseForks>
+            <argLine>-Djdk.attach.allowAttachSelf=true</argLine>
           </configuration>
         </plugin>
       </plugins>