Improve readability for nvplib error messages.
Improve readability for nvplib error messages.

Fixes bug #1189683

Change-Id: Idaf8e072291af2f08df6a502f1d87ee350aab0af

huntxu/neutron,armando-migliaccio/neutron,Brocade-OpenSource/OpenStack-DNRM-Neutron,sajuptpm/neutron-ipam,vbannai/neutron,jerryz1982/neutron,asgard-lab/neutron,wenhuizhang/neutron,CiscoSystems/neutron,vijayendrabvs/ssl-neutron,oeeagle/quantum,eonpatapon/neutron,projectcalico/calico-neutron,Juniper/neutron,sasukeh/neutron,ykaneko/neutron,takeshineshiro/neutron,SamYaple/neutron,sebrandon1/neutron,chitr/neutron,swdream/neutron,mandeepdhami/neutron,vveerava/Openstack,cloudbase/neutron-virtualbox,leeseuljeong/leeseulstack_neutron,bigswitch/neutron,Juniper/contrail-dev-neutron,vijayendrabvs/hap,cisco-openstack/neutron,zhhf/charging,dhanunjaya/neutron,klmitch/neutron,Stavitsky/neutron,blueboxgroup/neutron,virtualopensystems/neutron,vveerava/Openstack,skyddv/neutron,JianyuWang/neutron,virtualopensystems/neutron,yanheven/neutron,infobloxopen/neutron,armando-migliaccio/neutron,kaiweifan/neutron,neoareslinux/neutron,barnsnake351/neutron,CiscoSystems/vespa,netscaler/neutron,citrix-openstack-build/neutron,gkotton/neutron,Juniper/neutron,Juniper/neutron,wolverineav/neutron,miyakz1192/neutron,miyakz1192/neutron,klmitch/neutron,apporc/neutron,blueboxgroup/neutron,netscaler/neutron,watonyweng/neutron,leeseulstack/openstack,pnavarro/neutron,ntt-sic/neutron,suneeth51/neutron,mahak/neutron,cloudbase/neutron,zhhf/charging,beagles/neutron_hacking,cernops/neutron,mattt416/neutron,apporc/neutron,eonpatapon/neutron,eayunstack/neutron,ykaneko/neutron,alexandrucoman/vbox-neutron-agent,dims/neutron,SmartInfrastructures/neutron,igor-toga/local-snat,ntt-sic/neutron,Comcast/neutron,virtualopensystems/neutron,suneeth51/neutron,sasukeh/neutron,takeshineshiro/neutron,bigswitch/neutron,antonioUnina/neutron,yamahata/tacker,aristanetworks/neutron,javaos74/neutron,infobloxopen/neutron,glove747/liberty-neutron,leeseulstack/openstack,glove747/liberty-neutron,huntxu/neutron,Brocade-OpenSource/OpenStack-DNRM-Neutron,projectcalico/calico-neutron,CiscoSystems/quantum,silenci/neutron,aristanetworks/neutron,alexandrucoman/vbox-neutron-agent,vivekanand1101/neutron,vbannai/neutron,jacknjzhou/neutron,vveerava/Openstack,yuewko/neutron,beagles/neutron_hacking,vivekanand1101/neutron,Stavitsky/neutron,armando-migliaccio/neutron,leeseuljeong/leeseulstack_neutron,Juniper/contrail-dev-neutron,ntt-sic/neutron,rickerc/neutron_audit,Metaswitch/calico-neutron,kaiweifan/neutron,magic0704/neutron,yamahata/tacker,leeseuljeong/leeseulstack_neutron,vijayendrabvs/hap,CiscoSystems/vespa,sajuptpm/neutron-ipam,jumpojoy/neutron,silenci/neutron,swdream/neutron,citrix-openstack-build/neutron,magic0704/neutron,wolverineav/neutron,cernops/neutron,noironetworks/neutron,waltBB/neutron_read,jacknjzhou/neutron,mattt416/neutron,redhat-openstack/neutron,cisco-openstack/neutron,rdo-management/neutron,zhhf/charging,antonioUnina/neutron,yamahata/tacker,rickerc/neutron_audit,paninetworks/neutron,bgxavier/neutron,Metaswitch/calico-neutron,chitr/neutron,mahak/neutron,CiscoSystems/vespa,noironetworks/neutron,mahak/neutron,Comcast/neutron,sajuptpm/neutron-ipam,watonyweng/neutron,openstack/neutron,dims/neutron,blueboxgroup/neutron,vijayendrabvs/hap,Comcast/neutron,mandeepdhami/neutron,beagles/neutron_hacking,mmnelemane/neutron,jumpojoy/neutron,mmnelemane/neutron,cloudbase/neutron,pnavarro/neutron,dhanunjaya/neutron,openstack/neutron,cloudbase/neutron-virtualbox,SmartInfrastructures/neutron,SamYaple/neutron,armando-migliaccio/neutron,gopal1cloud/neutron,openstack/neutron,CiscoSystems/quantum,neoareslinux/neutron,MaximNevrov/neutron,shahbazn/neutron,gopal1cloud/neutron,waltBB/neutron_read,yamahata/neutron,eayunstack/neutron,NeCTAR-RC/neutron,kaiweifan/neutron,Brocade-OpenSource/OpenStack-DNRM-Neutron,adelina-t/neutron,wenhuizhang/neutron,Juniper/contrail-dev-neutron,shahbazn/neutron,javaos74/neutron,jerryz1982/neutron,CiscoSystems/neutron,barnsnake351/neutron,redhat-openstack/neutron,yanheven/neutron,igor-toga/local-snat,MaximNevrov/neutron,JianyuWang/neutron,netscaler/neutron,CiscoSystems/quantum,asgard-lab/neutron,adelina-t/neutron,citrix-openstack-build/neutron,NeCTAR-RC/neutron,gkotton/neutron,rickerc/neutron_audit,JioCloud/neutron,JioCloud/neutron,yamahata/neutron,sebrandon1/neutron,vbannai/neutron,vijayendrabvs/ssl-neutron,leeseulstack/openstack,gkotton/neutron,rdo-management/neutron,skyddv/neutron,CiscoSystems/neutron,ykaneko/neutron,yamahata/neutron,oeeagle/quantum,bgxavier/neutron,vijayendrabvs/ssl-neutron,yuewko/neutron,paninetworks/neutron