Swagger and wire values don't match leading to failed deserialization

Ported from https://github.com/Azure/azure-sdk-for-go/issues/5549

See reference [Path](https://github.com/Azure/azure-rest-api-specs/blob/master/specification/storage/data-plane/Microsoft.StorageDataLake/stable/2018-11-09/DataLakeStorage.json#L88).

The swagger defines `isDirectory` as `boolean` however the value sent over-the-wire is the string "true".
The swagger defines `contentLength` as `integer` however the value sent over-the-wire is the string "123".

Start with the referenced DataLakeStorage.json path at line 88 and inspect the declarations for isDirectory and contentLength alongside the reported wire values. Trace the related schema or deserialization behavior, then verify that the specification and wire representation agree and that the reported deserialization failure is covered by validation or an existing test.

Written by the indexing model from the issue text.