erp5_json_form: fix Content-Type and Cache-Control

bt5/erp5_json_form/ModuleComponentTemplateItem/portal_components/document.erp5.JSONForm.py

@@ -102,29 +102,30 @@ class JSONForm(JSONType, TextDocument):
       control.append("max-age=3600")
       control.append("private")
       REQUEST.RESPONSE.setHeader("Cache-control", ", ".join(control))
+      REQUEST.RESPONSE.setHeader("Content-Type", "application/json")
 
     return json.dumps(schema, indent=2).encode()
 
   security.declarePublic("getOutputJSONSchema")
   @UnrestrictedMethod
-  def getOutputJSONSchema(self, REQUEST=None):
+  def getOutputJSONSchema(self):
     """
     Method to retrieve the expected JSON Schema for JSON input
     """
     return self.returnSchema(
       self.getOutputSchema(),
       "/getOutputJSONSchema",
-      REQUEST
+      self.REQUEST
     )
 
   security.declarePublic("getInputJSONSchema")
   @UnrestrictedMethod
-  def getInputJSONSchema(self, REQUEST=None):
+  def getInputJSONSchema(self):
     """
     Method to retrieve the expected JSON Schema for JSON output
     """
     return self.returnSchema(
       self.getTextContent(),
       "/getInputJSONSchema",
-      REQUEST
+      self.REQUEST
     )