Incorrect and documented Zally rule introduced failures

[dneuhaeuser-zalando]

We have recently started getting violations reported from Zally such as:

MUST Path parameters validation
	Parameter blocklist_id: "content" property should have exactly one entry
	https://github.com/zalando/zally/blob/master/server/rules.md#z001-path-parameters-validation
		components > parameters > BlocklistId (lines 31-40)

The corresponding path parameter has a schema property. The OpenAPI spec defines schema and content to be mutually exclusive. So this is simply wrong.

The link in the error message is also wrong and doesn't provide an explanation on this anywhere on the linked page.

[vadeg]

@dneuhaeuser-zalando could you give a schema example?