Fix program name in --version output
Fix program name in --version output

Neutron currently outputs something like

---
$ neutron-server --version
%prog 11.el7ost
---

I'm guessing since Ied2acb37c366f1a45aed72b6b76f11e2de23828e when
oslo.config moved from optparse to argparse?

Change-Id: Ie51d2d1263a215390e106201b35902d6c401506d

NeCTAR-RC/neutron,blueboxgroup/neutron,watonyweng/neutron,rdo-management/neutron,SmartInfrastructures/neutron,antonioUnina/neutron,cloudbase/neutron-virtualbox,MaximNevrov/neutron,sasukeh/neutron,antonioUnina/neutron,adelina-t/neutron,paninetworks/neutron,waltBB/neutron_read,openstack/neutron,dims/neutron,mahak/neutron,dhanunjaya/neutron,glove747/liberty-neutron,adelina-t/neutron,cisco-openstack/neutron,cisco-openstack/neutron,neoareslinux/neutron,klmitch/neutron,skyddv/neutron,CiscoSystems/neutron,CiscoSystems/neutron,javaos74/neutron,NeCTAR-RC/neutron,vveerava/Openstack,asgard-lab/neutron,cloudbase/neutron,chitr/neutron,sebrandon1/neutron,SmartInfrastructures/neutron,blueboxgroup/neutron,watonyweng/neutron,bigswitch/neutron,eonpatapon/neutron,magic0704/neutron,waltBB/neutron_read,openstack/neutron,yanheven/neutron,sebrandon1/neutron,leeseulstack/openstack,bgxavier/neutron,miyakz1192/neutron,yanheven/neutron,CiscoSystems/neutron,jumpojoy/neutron,dims/neutron,Stavitsky/neutron,projectcalico/calico-neutron,jacknjzhou/neutron,bigswitch/neutron,silenci/neutron,SamYaple/neutron,eonpatapon/neutron,igor-toga/local-snat,aristanetworks/neutron,huntxu/neutron,vveerava/Openstack,mattt416/neutron,Stavitsky/neutron,eayunstack/neutron,yuewko/neutron,gkotton/neutron,neoareslinux/neutron,dhanunjaya/neutron,JioCloud/neutron,JioCloud/neutron,eayunstack/neutron,sasukeh/neutron,barnsnake351/neutron,skyddv/neutron,mmnelemane/neutron,leeseulstack/openstack,mmnelemane/neutron,takeshineshiro/neutron,openstack/neutron,vveerava/Openstack,miyakz1192/neutron,rdo-management/neutron,yuewko/neutron,mandeepdhami/neutron,cloudbase/neutron,MaximNevrov/neutron,JianyuWang/neutron,shahbazn/neutron,klmitch/neutron,alexandrucoman/vbox-neutron-agent,alexandrucoman/vbox-neutron-agent,mahak/neutron,huntxu/neutron,pnavarro/neutron,jerryz1982/neutron,Metaswitch/calico-neutron,wolverineav/neutron,projectcalico/calico-neutron,silenci/neutron,mandeepdhami/neutron,jerryz1982/neutron,Metaswitch/calico-neutron,paninetworks/neutron,wenhuizhang/neutron,noironetworks/neutron,javaos74/neutron,vivekanand1101/neutron,infobloxopen/neutron,leeseulstack/openstack,bgxavier/neutron,chitr/neutron,suneeth51/neutron,jumpojoy/neutron,barnsnake351/neutron,noironetworks/neutron,gkotton/neutron,asgard-lab/neutron,apporc/neutron,wolverineav/neutron,leeseuljeong/leeseulstack_neutron,blueboxgroup/neutron,suneeth51/neutron,leeseuljeong/leeseulstack_neutron,swdream/neutron,magic0704/neutron,SamYaple/neutron,glove747/liberty-neutron,leeseuljeong/leeseulstack_neutron,swdream/neutron,shahbazn/neutron,cloudbase/neutron-virtualbox,jacknjzhou/neutron,infobloxopen/neutron,wenhuizhang/neutron,apporc/neutron,JianyuWang/neutron,mahak/neutron,vivekanand1101/neutron,gkotton/neutron,takeshineshiro/neutron,pnavarro/neutron,mattt416/neutron,igor-toga/local-snat,aristanetworks/neutron