Remove property on virtual_host in TransportURL
Remove property on virtual_host in TransportURL

This isn't useful at all.

Change-Id: I1025da66a0f382cc3ecec15acf01890d75257a6a

apporc/oslo.messaging,dukhlov/oslo.messaging,ozamiatin/oslo.messaging,stevei101/oslo.messaging,magic0704/oslo.messaging,redhat-openstack/oslo.messaging,viggates/oslo.messaging,JioCloud/oslo.messaging,hkumarmk/oslo.messaging,isyippee/oslo.messaging,stevei101/oslo.messaging,redhat-openstack/oslo.messaging,ozamiatin/oslo.messaging,isyippee/oslo.messaging,dukhlov/oslo.messaging,zhurongze/oslo.messaging,eayunstack/oslo.messaging,apporc/oslo.messaging,magic0704/oslo.messaging,dims/oslo.messaging,hkumarmk/oslo.messaging,zhurongze/oslo.messaging,dims/oslo.messaging