Add gravity flow demo

backend/wordpress/wp-content/plugins/gravityflow-master/tests/acceptance-tests/start.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+cd ../../
+
+# Run just one test
+#docker-compose run --rm codeception run tests/acceptance-tests/acceptance/0026RoleAssigneeTokenCept.php -vvv --html
+
+# Run tests in a group.
+# Create groups by adding the following comment to the top of the tests
+# // @group myGroup
+#docker-compose run --rm codeception run -g myGroup -vvv --html
+
+# Run all tests
+docker-compose run --rm codeception run -vvv --html