Changes to Create an envelope

added the new skipped enum value to the envelope/envelope/detectionStatus response property for the response status 201

added the new optional request property documents

added the new optional request property fields/items/group

added the new optional request property fields/items/syntheticRoleId

added the new optional request property fields/items/syntheticRoleName

the request property document became optional

added the optional property envelope/fields/items/group to the response with the 201 status

added the optional property envelope/fields/items/syntheticRoleId to the response with the 201 status

added the optional property envelope/fields/items/syntheticRoleName to the response with the 201 status

added the required property envelope/fields/items/locked to the response with the 201 status