make sure getSystemProperties() is supported

Author: thurka

visualvm/profiler/src/org/graalvm/visualvm/profiler/CalibrationSupport.java

@@ -52,6 +52,7 @@ final class CalibrationSupport {
 
     static boolean checkCalibration(Application app, Runnable before, Runnable after) {
         Jvm jvm = JvmFactory.getJVMFor(app);
+        if (!jvm.isGetSystemPropertiesSupported()) return false;
         Properties properties = jvm.getSystemProperties();
         if (properties == null) return false;