Merge pull request #147 from kosz85/patch-2

Fix Migrations.all_migrations() list by clearing cache

tenant_schemas/management/commands/migrate_schemas.py

@@ -30,6 +30,8 @@ class Command(SyncCommon):
         for app in ignored_apps:
             app_label = app.split('.')[-1]
             settings.SOUTH_MIGRATION_MODULES[app_label] = 'ignore'
+            
+        self._clear_south_cache()
 
     def _save_south_settings(self):
         self._old_south_modules = None