* Added API Key auth middleware to v2 content API
refs #9865
- add `auth.authenticate.authenticateContentApiKey` middleware
- accepts `?key=` query param, sets `req.api_key` if it's a known Content API key
- add `requiresAuthorizedUserOrApiKey` authorization middleware
- passes if either `req.user` or `req.api_key` exists
- update `authenticatePublic` middleware stack for v2 content routes
* Fixed functional content api tests
no-issue
This fixes the functional content api tests so they use the content api
auth.
* Fixed context check and removed skip
* Updated cors middleware for content api
* Removed client_id from frame.context
no-issue
The v2 api doesn't have a notion of clients as we do not use oauth for it
* Fixed tests for posts input serializer