fix sys.path dance part #2 and scheduler tests for py3

gluon/tests/test_old_doctests.py

@@ -4,22 +4,21 @@
 """ Unit tests for old doctests in utf8.py, html.py, markmin2html.py.
     Don't abuse doctests, web2py > 2.4.5 will accept only unittests
 """
-import sys
-import os
+
 import doctest
 import unittest
 
 def load_tests(loader, tests, ignore):
 
     tests.addTests(
-        doctest.DocTestSuite('html')
+        doctest.DocTestSuite('gluon.html')
         )
     tests.addTests(
-        doctest.DocTestSuite('utf8')
+        doctest.DocTestSuite('gluon.utf8')
         )
 
     tests.addTests(
-        doctest.DocTestSuite('contrib.markmin.markmin2html',
+        doctest.DocTestSuite('gluon.contrib.markmin.markmin2html',
         )
     )