HTTP Consumer - content type error on new nodes

[davixim]

Steps to reproduce

1. Add a new node "HTTP Consumer"
2. Fill in the URL

3. Run the workflow
4. The node returns the following error:
   "undefined contentType not supported by this component"

Workaround

1. Open the Content Type dropdown and change the value to anything other than "application/json"
2. Save and close the node configuration window
3. Reopen the node configuration
4. Select "application/json" again