Allow to fetch tests from Business Templates.

master/tests/__init__.py

 from test_suite import SavedTestSuite, ProjectTestSuite
 class VIFIB(SavedTestSuite, ProjectTestSuite):
+  _bt_list = [
+    'erp5_configurator_vifib',
+    'vifib_base',
+    'vifib_core',
+    'vifib_crm',
+    'vifib_data',
+    'vifib_data_category',
+    'vifib_data_web',
+    'vifib_erp5',
+    'vifib_forge_release',
+    'vifib_l10n_fr',
+    'vifib_mysql_innodb_catalog',
+    'vifib_open_trade',
+    'vifib_slap',
+    'vifib_software_pdm',
+    'vifib_upgrader',
+    'vifib_web',
+  ]
   _product_list = ['Vifib']
   _saved_test_id = 'Products.Vifib.tests.VifibMixin'