Support CBE channel differentiation (FEA100478)

Added primaryOnly boolean value to specify if a restriction should only apply to the primary Booking Engine channel or all booking engine channels (when the attribute is FALSE or not passed).

The following is a partial request for POST and DELETE operations:

{
	...
	"channelList": [
		{
			"code": "WEB",
			"primaryOnly": true
		}
	],
	...
}

The following is a partial response for a GET operation:

{
	...
	"channel": {
		"code": "WEB",
		"primaryOnly": true
	},
	...
}

Corrections to out of date YAML file (DE301676 & DE304600)

The API definition in the YAML file was not matching the functionality actually supported by the API. There were no changes made to the API, this was just a documentation update. Room Upsell restrictions are only supported in the GET operation and have been removed from POST operation.