autotest/virt-test — pull request #1510 by ypu (2014-03-13 15:12:15+00:00)
Title: virttest: Make Numa related functions can work on host have disabled node

Now the functions and classes caculate node id by nodes number. And
in a host have disabled node, it may give scripts the disabled node
id. This patch will fix this problem by use available nodes to decide
the node scripts should use.