Copied blob has incorrect content type

[maf1024]

After copying a blob, the copy has a content type of "application/octet-stream" instead of whatever was on the source blob.

Example powershell code to reproduce below.
When it runs against a real Azure storage account, the copy's resultant content type is "image/png" as expected.

New-Item "emptyfile.zzz"

#Upload as blob
$ctx = New-AzureStorageContext -Local
$container = New-AzureStorageContainer "mime-bug-repro" -Context $ctx
$originalBlob = Set-AzureStorageBlobContent -Blob "emptyfile.zzz" -Container $container.Name -File "emptyfile.zzz" -BlobType Block -Properties @{"ContentType" = "image/png"} -Context $ctx

#Initiate copy
$copyJob = Start-AzureStorageBlobCopy -SrcBlob $originalBlob.Name -SrcContainer $container.Name -DestBlob "copy-of-emptyfile.zzz" -DestContainer $container.Name -Context $ctx -DestContext $ctx
#Wait for copy.
while(($copyJob | Get-AzureStorageBlobCopyState).Status -ne "Success")
{
    sleep 5
}

#Get copy
$copiedBlob = Get-AzureStorageBlob -Container $container.Name -Blob "copy-of-emptyfile.zzz" -Context $ctx 

#Check ContentType
"The content type of the copy is: $($copiedBlob.ContentType)"

#Clean up file and container
$container | Remove-AzureStorageContainer -Force
Remove-Item "emptyfile.zzz"

[XiaoningLiu]

This issue should have be resolved.