sync common.log from oslo
sync common.log from oslo

Change-Id: Iedcbd93c6c31fd0580df8c1392e107b1c3bb1c01

SauloAislan/ironic,bacaldwell/ironic,rackerlabs/ironic,NaohiroTamura/ironic,Tan0/ironic,naototty/vagrant-lxc-ironic,redhat-openstack/ironic,froyobin/ironic,JioCloud/ironic,devananda/ironic,varunarya10/ironic,faizan-barmawer/openstack_ironic,pshchelo/ironic,dims/ironic,ionutbalutoiu/ironic,debayanray/ironic_backup,hpproliant/ironic,Tehsmash/ironic,supermari0/ironic,dims/ironic,naterh/ironic,ramineni/myironic,ionutbalutoiu/ironic,naototty/vagrant-lxc-ironic,bacaldwell/ironic,openstack/ironic,rdo-management/ironic,SauloAislan/ironic,NaohiroTamura/ironic,pshchelo/ironic,openstack/ironic