Replace xrange() with range() in six.moves
Replace xrange() with range() in six.moves

range maps to xrange() and range() in python2 and python3 respectively.

TrivialFix
Change-Id: I9b2477a17a570c3ce945badacbfa44889c0634a9

mandre/kolla,coolsvap/kolla,intel-onp/kolla,GalenMa/kolla,mandre/kolla,limamauricio/mykolla,mrangana/kolla,toby82/kolla,toby82/kolla,stackforge/kolla,mrangana/kolla,rahulunair/kolla,nihilifer/kolla,negronjl/kolla,tonyli71/kolla,coolsvap/kolla,GalenMa/kolla,limamauricio/mykolla,openstack/kolla,stackforge/kolla,tonyli71/kolla,nihilifer/kolla,toby82/kolla,limamauricio/mykolla,dardelean/kolla-ansible,openstack/kolla,rahulunair/kolla,coolsvap/kolla,mandre/kolla,negronjl/kolla,stackforge/kolla,negronjl/kolla,intel-onp/kolla,dardelean/kolla-ansible,dardelean/kolla-ansible