Add a flags check to the beginning of blkio_parameters=
Add a flags check to the beginning of blkio_parameters=

That way we'll catch invalid argument errors early.

Signed-off-by: Chris Lalancette <60b62644009db6b194cc0445b64e9b27bb26433a@redhat.com>

pronix/ruby-libvirt,pronix/ruby-libvirt,pronix/ruby-libvirt