Azure multipart upload fails when submitting payloads that are multiples of MAX_BLOCK_SIZE

Azure multipart upload breaks when trying up upload payloads that are multiples of MAX_BLOCK_SIZE.

For example, when trying to upload 64 * 1024 * 1024 byte payload, I get the following errors:
http://pastebin.com/3WbJ3GXw

The fix should be in figuring out the remainder for number of blocks in AzureBlobBlockUploadStrategy.java