revive getUnitTestFile function that I mistakenly removed

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@10025 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/tests/runUnitTest.py

@@ -28,6 +28,10 @@ Options:
  
 """
 
+def getUnitTestFile():
+  """returns the absolute path of this script.
+  This is used by template tool to run unit tests."""
+  return os.path.abspath(__file__)
 
 def initializeInstanceHome(tests_framework_home,
                            real_instance_home,