sync common.periodic_task from oslo
sync common.periodic_task from oslo

Change-Id: I48893105877d18534099096a13da852e3e3ecbc2

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