Add extras modules to ModuleTestCase

issue7935
review50661002

setup.py

@@ -51,6 +51,7 @@ for dep in info.get('depends', []):
         requires.append(get_require_version('trytond_%s' % dep))
 requires.append(get_require_version('trytond'))
 
+tests_require = [get_require_version('trytond_account_dunning')]
 dependency_links = []
 if minor_version % 2:
     dependency_links.append('https://trydevpi.tryton.org/')
@@ -118,4 +119,5 @@ setup(name=name,
     """,
     test_suite='tests',
     test_loader='trytond.test_loader:Loader',
+    tests_require=tests_require,
     )