virt.migrate: Add support for compression
virt.migrate: Add support for compression

libvirt allows the use of compression with live migration. There are
two compression methods currently supported: "mt" and "xbzrle".

This patch allows extends the virt.migrate function with additional set
of options that allow to enable and configure the compression
functionality of libvirt.

Signed-off-by: Radostin Stoyanov <af191057dab5b67c1c1061d181b58b884c4ed7f3@fedoraproject.org>

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt