Openapi Schema improvements

- Return proper booleans in api responses
- Update jsonschemavalidation to latest draft

backend/schema/paths/nginx/streams/streamID/get.json

@@ -34,13 +34,13 @@
 								"incoming_port": 9090,
 								"forwarding_host": "router.internal",
 								"forwarding_port": 80,
-								"tcp_forwarding": 0,
-								"udp_forwarding": 0,
+								"tcp_forwarding": true,
+								"udp_forwarding": false,
 								"meta": {
 									"nginx_online": true,
 									"nginx_err": null
 								},
-								"enabled": 1
+								"enabled": true
 							}
 						}
 					},