Use c-style string interpolation for log messages in kolla-build
Use c-style string interpolation for log messages in kolla-build

TrivialFix

Change-Id: I4b01402f8feb029563a90d4941c8d829a05794e0

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