Fix oslo namespace in default log level
Fix oslo namespace in default log level

Default log level setup is broken for oslo.messaging since old oslo
namespace is used, oslo_messaging namespace should be used instead.

Also replace deprecated WARN log level with new WARNING for default
log level set.

Change-Id: Idd6ace4176fe6fd1148f1b4fcc1fa29dc966b61e
Closes-Bug: #1515908

dims/ironic,openstack/ironic,SauloAislan/ironic,bacaldwell/ironic,pshchelo/ironic,ionutbalutoiu/ironic,bacaldwell/ironic,pshchelo/ironic,ionutbalutoiu/ironic,SauloAislan/ironic,dims/ironic,hpproliant/ironic,NaohiroTamura/ironic,devananda/ironic,openstack/ironic,NaohiroTamura/ironic