Import hook scripts as <script> instead of script

Why take the chance to potentially clobber a module named 'script'?

slapos/recipe/cmmi/__init__.py

@@ -145,7 +145,7 @@ class Recipe(EnvironMixin):
         try:
             if not is_temp:
                 filename = os.path.abspath(filename)
-            module = module_from_file_location('script', filename)
+            module = module_from_file_location('<script>', filename)
             script = getattr(module, callable.strip())
             try:
                 script(self.options, self.buildout, self.environ)