Changes to Create a meeting

removed the request property data/external_ref

the data/description request property's maxLength was set to 10000

the data/title request property's maxLength was set to 1000

added the new optional request property data/participants/items/name

the request property data/participants/items/email_address became optional

added the required property data/participants/items/name to the response with the 200 status

endpoint added