[FIX] http: force removing the debug in redirection

In case of local_redirect with
* forward_debug=False
* qwery={'debug': True}

the debug mode should be removed.

cf discusion on #12107 and dd4980b0

openerp/http.py

@@ -141,8 +141,11 @@ def local_redirect(path, query=None, keep_hash=False, forward_debug=True, code=3
     url = path
     if not query:
         query = {}
-    if forward_debug and request and request.debug:
-        query['debug'] = ''
+    if request and request.debug:
+        if forward_debug:
+            query['debug'] = ''
+        else:
+            query['debug'] = None
     if query:
         url += '?' + werkzeug.url_encode(query)
     if keep_hash: