private void resetSystemProperties() {
        for (String propName : resetSysProps) {
            log("Clearing system property " + propName);
            System.clearProperty(propName);
        }
        resetSysProps.clear();
    }
Resets the system properties that were set at the start of the test.
manager/test/api/src/main/java/io/apiman/manager/test/junit/ManagerRestTester.java