Fixes #4037 - Add README describing how to debug with REST TCK (#4038)

external/coreprofile-tck/rest/README.md

@@ -0,0 +1,38 @@
+README
+======
+
+The `runner` module runs the REST TCK tests so make sure you are in its 
+directory when you need to debug any tests.
+
+To run a single test, use the following command:
+
+```
+mvn -Dit.test=TestName verify
+```
+
+To run a single test in debug mode, use the following command:
+
+```
+mvn -Dmaven.surefire.debug -Dit.test=TestName verify 
+```
+
+To run a single test in debug mode with a specific port, use the following 
+command:
+
+```
+mvn -Dmaven.surefire.debug -Dmaven.surefire.debug.port=5005 -Dit.test=TestName verify
+```
+
+To run a single test in debug mode with a specific port and suspend, use the 
+following command:
+
+```
+mvn -Dmaven.surefire.debug -Dmaven.surefire.debug.port=5005 -Dmaven.surefire.debug.suspend=y -Dit.test=TestName verify
+```
+
+To run a single test and put Piranha in debug and susspend mode use the 
+following command:
+
+```
+mvn -Dpiranha.debug=true -Dpiranha.suspend=true -Dit.test=TestName verify
+```