Remove unused CONF variable in test_ipminative.py
Remove unused CONF variable in test_ipminative.py

Change-Id: I6591c77504ff3683b534b158aaae979c23687b39

openstack/ironic,devananda/ironic,bacaldwell/ironic,redhat-openstack/ironic,Tan0/ironic,dims/ironic,openstack/ironic,pshchelo/ironic,SauloAislan/ironic,ionutbalutoiu/ironic,NaohiroTamura/ironic,bacaldwell/ironic,SauloAislan/ironic,naterh/ironic,ionutbalutoiu/ironic,pshchelo/ironic,naototty/vagrant-lxc-ironic,dims/ironic,hpproliant/ironic,NaohiroTamura/ironic,naototty/vagrant-lxc-ironic