libvirt: don't pass a module import into methods

For some reason the 'vconfig' module import is being passed
into the _set_kvm_timers method. This serves no purpose other
than to confuse people.

Change-Id: If61e9855beddf66ac8a4fbfb59dc8bb2e22bdccf
Merge "libvirt: don't pass a module import into methods"