Update doc to support request as well
Update doc to support request as well

Fetch attendee callout works for Request as well, so removing references to Expense and changing them to more generic Concur.
concur/developer.concur.com,HeathH-Concur/developer.concur.com,sarraloew/developer.concur.com,bhague1281/developer.concur.com,concur/developer.concur.com,concur/developer.concur.com,HeathH-Concur/developer.concur.com,bhague1281/developer.concur.com,sarraloew/developer.concur.com,bhague1281/developer.concur.com,concur/developer.concur.com,HeathH-Concur/developer.concur.com,sarraloew/developer.concur.com,HeathH-Concur/developer.concur.com,sarraloew/developer.concur.com,HeathH-Concur/developer.concur.com,concur/developer.concur.com,sarraloew/developer.concur.com,bhague1281/developer.concur.com,bhague1281/developer.concur.com