Modify a different agent in test_update_agent_description
Modify a different agent in test_update_agent_description

API test_update_agent_description modifies an agent's description, and
test_list_agent assumes the first agent is never modified. We make
sure that an agent other than the first one is modified.

Closes-bug: 1437124

Change-Id: I7593e2896ab7ef8a14ad35005314382e65e805cb

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