Spring cloud contract with content type application/x-ndjson

[FlxGschlr]

Describe the bug
The stub response body is incorrect if the content-type "application/x-ndjson" is used. An identical problem has been described in #1535.

"application/stream+json" has been deprecated and my team is using "application/x-ndjson" instead (recommendation in the spring restdocs). As mentioned in #1535 the generated stub only returns the first element now.

You can reproduce the issue by changing the content-type to "application/x-ndjson" in the following test:

       @Issue("#1535")
	def "should work with streams"() {
		given:
			Contract contractDsl = Contract.make {
				description "should return all entities"
				request{
					method GET()
					url("/api/v1/entities")
				}
				response {
					headers {
						header 'Content-Type': 'application/stream+json'