upload: use low level copy and print a progress bar
upload: use low level copy and print a progress bar

Using python code to copy the file measuring its progress
and printing a progress bar.

Change-Id: I2a28947cd607be83c51b25bfcdb5ef50a58afbbb
Bug-Url: https://bugzilla.redhat.com/1077235
Signed-off-by: Simone Tiraboschi <cb03129c66ba4da7ba7044049d0f43907bf857bb@redhat.com>

oVirt/ovirt-image-uploader,oVirt/ovirt-image-uploader,oVirt/ovirt-image-uploader