nanostack-mac-tester sync with v1.0.1

Sync application and testcases with v1.0.1 of the master copy.

Author: Arto Kinnunen

TEST_APPS/testcases/nanostack_mac_tester/ED_scan.py

@@ -121,7 +121,11 @@ def case(self):
             except TestStepFail:
                 self.logger.info("Warning, iteration failed #"  + str(loop+1))
                 loop = loop + 1
-                self.delay(5)
+                if (loop < 5):
+                    self.stop_event.set()
+                    self.th.join()
+                    self.delay(5)
+
         else:
              raise TestStepFail("Too many failed iterations!")