Remove a redundant KeyPairsV3ClientJSON
Remove a redundant KeyPairsV3ClientJSON

There are duplicated KeyPairsV3ClientJSON settings in __init__()
of Manager class. This patch removes it.

Change-Id: Ia19e8db43d601c7ca919820c62da699e660e0623

Tesora/tesora-tempest,yamt/tempest,openstack/tempest,rakeshmi/tempest,danielmellado/tempest,pczerkas/tempest,eggmaster/tempest,flyingfish007/tempest,varunarya10/tempest,redhat-cip/tempest,masayukig/tempest,eggmaster/tempest,hayderimran7/tempest,jamielennox/tempest,cisco-openstack/tempest,Lilywei123/tempest,akash1808/tempest,cisco-openstack/tempest,Juniper/tempest,afaheem88/tempest_neutron,Juraci/tempest,manasi24/jiocloud-tempest-qatempest,zsoltdudas/lis-tempest,roopali8/tempest,hayderimran7/tempest,xbezdick/tempest,LIS/lis-tempest,Lilywei123/tempest,Juraci/tempest,rakeshmi/tempest,jaspreetw/tempest,Tesora/tesora-tempest,nunogt/tempest,manasi24/tempest,xbezdick/tempest,Juniper/tempest,hpcloud-mon/tempest,tonyli71/tempest,izadorozhna/tempest,alinbalutoiu/tempest,neerja28/Tempest,Vaidyanath/tempest,afaheem88/tempest,redhat-cip/tempest,nunogt/tempest,izadorozhna/tempest,akash1808/tempest,yamt/tempest,dkalashnik/tempest,CiscoSystems/tempest,neerja28/Tempest,Vaidyanath/tempest,sebrandon1/tempest,openstack/tempest,hpcloud-mon/tempest,JioCloud/tempest,pandeyop/tempest,vedujoshi/tempest,FujitsuEnablingSoftwareTechnologyGmbH/tempest,flyingfish007/tempest,pandeyop/tempest,NexusIS/tempest,manasi24/tempest,varunarya10/tempest,JioCloud/tempest,tudorvio/tempest,masayukig/tempest,vedujoshi/tempest,bigswitch/tempest,tonyli71/tempest,danielmellado/tempest,FujitsuEnablingSoftwareTechnologyGmbH/tempest,NexusIS/tempest,tudorvio/tempest,zsoltdudas/lis-tempest,jaspreetw/tempest,rzarzynski/tempest,rzarzynski/tempest,roopali8/tempest,dkalashnik/tempest,sebrandon1/tempest,afaheem88/tempest,CiscoSystems/tempest,alinbalutoiu/tempest,jamielennox/tempest,manasi24/jiocloud-tempest-qatempest,ebagdasa/tempest,bigswitch/tempest,ebagdasa/tempest,LIS/lis-tempest,afaheem88/tempest_neutron,pczerkas/tempest