Changes to Export CDRs

the query request parameter disposition was restricted to a list of enum values

added the new enum value all to the query request parameter disposition

added the new enum value answered to the query request parameter disposition

added the new enum value busy to the query request parameter disposition

added the new enum value failed to the query request parameter disposition

added the new enum value noanswer to the query request parameter disposition

for the query request parameter disposition, the type was generalized from no type to string

added the non-success response with the status 401

endpoint added