Update error return code to match new Pecan release
Update error return code to match new Pecan release

Change-Id: I2606ff31165e8a83d872a0b64e071fc92ed63db5

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