Clarify how to resolve a uuid collision
Clarify how to resolve a uuid collision

Previously 'tox -epep8' just says run 'tox -v -euuidgen' but without
manually removing the duplicate uuid it fails to fix things and says run
'tox -v -euuidgen' again.

Change-Id: I1948c2d038d89af8dcfe69d01dcc49d024ae3210

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