Changes to Create Asset

removed the enum value 'DAYS' of the request property asset/useful_life/type

removed the enum value 'MONTHS' of the request property asset/useful_life/type

removed the enum value 'YEARS' of the request property asset/useful_life/type

added the new optional query request parameter check_duplicate_serial_number

added the new optional request property asset/assigned_to

added the new optional request property asset/custom_fields

added the new optional request property asset/location_uid

added the new optional request property asset/secondary_customers

added the new DAYS enum value to the request property asset/useful_life/type

added the new MONTHS enum value to the request property asset/useful_life/type

added the new YEARS enum value to the request property asset/useful_life/type