[Delivers #48506135] Fix Out of Memory error when uploading large files

https://www.pivotaltracker.com/story/show/48506135

### Changes
- Added the ChunkRequest = true to all requests to the SimpleRestServices stream methods.  This will caused the uploads to chunk and not buffer the whole stream.  
- Modified the objectName parameter in the CreateObjectFromFile to be optional (default to null).  If the value is null, it will just use the name of the file being uploaded.