bootstrap: get_asset - Fix handling of assets with no sha1_url

Some assets may not have a url with SHA1sum of its files.
Let's just not check the SHA1sum then.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
shared/download.d - Add virtio-win.ini

Add an asset file for the public virtio windows drivers
ISO. This will come handy for people that want to install
and test their windows guests using the drivers.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
utils_disk: Make floppy disk creation to not require root

Similarly to our cdrom creation code, we can replace
using loop devices for the mtools, that are pretty much
ubiquitous on linux distros.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
tools/virt_disk.py - Add floppy disk size

Add the ability to set the disk size in the virt disk
utility.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
unattended_install: Aligning FloppyDisk calls

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>