More robust database removal method in tests

It may need some time until the database file is really removed.

Author: Cito

webware/Tests/TestEndToEnd/TestExamples.py

@@ -28,8 +28,8 @@ def removeDemoDatabase():
             except OSError:
                 sleep(.5)
             else:
-                sleep(.5)
                 break
+        sleep(.5)
 
     def testStartPage(self):
         r = self.testApp.get('/')