Resolve race conditions during content loading when overriding suppor…

…t files (#826)

Fixes the following issues:
- Some grammars importing the built-in Caster support file while only some importing The overridden one in the user directory

- Double imports, ( that is importing the same file under two different names) because some grammars will import the standard support file from the try branch while others From the except branch, raking havoc if support file contains some sort of mutable state

castervoice/lib/ctrl/mgr/loading/load/content_loader.py

@@ -103,6 +103,7 @@ def _process_requests(self, requests):
         for request in requests:
             if request.directory not in path:
                 path.append(request.directory)
+        for request in requests:
             content_item = self.idem_import_module(request.module_name, request.content_type)
             if content_item is not None:
                 result.append(content_item)