Shorten output by not displaying full path to file

Also put the file name before the test name.  The resulting output will look like

test_760_tomcat.py: test_01_stop_tomcat ... okskip

osgtest/library/osgunittest.py

@@ -245,6 +245,12 @@ def run(self, result=None, **kwargs):
         finally:
             result.stopTest(self)
 
+    def __str__(self):
+        module = self.__class__.__module__
+        if '.' in module:
+            module = module[module.rfind('.')+1:]  # strip off all but the last component
+        return "%s.py: %s" % (module, self._testMethodName)
+
 
 class OSGTestResult(unittest.TestResult):
     """