Gives the opportunity to set the pointer type from image properties.
Implements: blueprint virt-configure-usb-tablet-from-image
Change-Id: I11d3e031c202c39258263212401a0f035ec67d88
A new global option to handle input devices has
been introduced. The specifc option use_usb_tablet in the
group libvirt has been depecreated for Newton and should be
removed for O*
Related-To: blueprint virt-configure-usb-tablet-from-image
Change-Id: I51186530a94d86c8ed14783c7d42d0a3bd601f59