Changes to List plans.

removed the required property items/maxApps from the response with the 200 status

the endpoint scheme security ApiKeyAuth was added to the API

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 429

added the non-success response with the status 500

added the optional property items/freeCreditMicros to the response with the 200 status

added the optional property items/maxDiskGb to the response with the 200 status

added the optional property items/rateBaseHourMicros to the response with the 200 status

added the optional property items/rateDiskGbHourMicros to the response with the 200 status

added the optional property items/rateEgressGbMicros to the response with the 200 status

added the optional property items/selfServe to the response with the 200 status

added the required property items/allowAlwaysOn to the response with the 200 status

added the required property items/maxGroups to the response with the 200 status

added the required property items/monthlyFeeMicros to the response with the 200 status