Always set the copyProgress field.

[trekawek]

Before this change, the Azure Java SDK was failing on the list operation if it included copied blobs:

Exception in thread "main" java.util.NoSuchElementException: An error occurred while enumerating the result, check the original exception for details.
        at com.microsoft.azure.storage.core.LazySegmentedIterator.hasNext(LazySegmentedIterator.java:113)
[...]
Caused by: com.microsoft.azure.storage.StorageException: OK
        at com.microsoft.azure.storage.StorageException.translateException(StorageException.java:87)
        at com.microsoft.azure.storage.core.ExecutionEngine.executeWithRetry(ExecutionEngine.java:209)
        at com.microsoft.azure.storage.core.LazySegmentedIterator.hasNext(LazySegmentedIterator.java:109)
        ... 4 more
Caused by: java.lang.NumberFormatException: For input string: "undefined"
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
        at java.lang.Long.parseLong(Long.java:589)
        at java.lang.Long.parseLong(Long.java:631)
        at com.microsoft.azure.storage.blob.BlobListHandler.setProperties(BlobListHandler.java:312)
        at com.microsoft.azure.storage.blob.BlobListHandler.endElement(BlobListHandler.java:188)
[... SAX parsing ...]
        at com.microsoft.azure.storage.blob.BlobListHandler.getBlobList(BlobListHandler.java:75)
        at com.microsoft.azure.storage.blob.CloudBlobContainer$7.postProcessResponse(CloudBlobContainer.java:1473)
        at com.microsoft.azure.storage.blob.CloudBlobContainer$7.postProcessResponse(CloudBlobContainer.java:1437)
        at com.microsoft.azure.storage.core.ExecutionEngine.executeWithRetry(ExecutionEngine.java:155)

[edwin-huber]

Many thanks for your contribution!

[edwin-huber]

Travis failure OK, this is a flaky test for some reason, needs debugging to check how we get a race condition or similar, not a problem with this code.