Add the endorsed.lib from TCK to run the client

The Servlet server push tests uses the flow.jar to
make the HTTP/2 requests. However, as this jar add
classes to java namespace, it has to be added to as endorsed lib
diff --git a/src/test/resources/testsuite.properties b/src/test/resources/testsuite.properties
index a802bae..4c946b6 100644
--- a/src/test/resources/testsuite.properties
+++ b/src/test/resources/testsuite.properties
@@ -39,7 +39,7 @@
         -Djavax.net.ssl.keyStorePassword=changeit \
         -Djavax.net.ssl.trustStore=${keystores.dir}/ssl-truststore \
         -Djavax.net.ssl.trustStorePassword=changeit \
-        -Djava.endorsed.dirs=${s1as.java.endorsed.dirs} \
+        -Djava.endorsed.dirs=${s1as.java.endorsed.dirs}${pathsep}${ts.home}/endorsedlib \
         -Dcom.sun.aas.installRoot=${javaee.home} \
         -Dcatalina.base=${openejb.home} \
         -Dlog.file.location=${log.file.location} \