Adapt documentation for negative testing
Adapt documentation for negative testing

With the introduction of the new negative testing framework the workflow
for new test has changed.

Partially-implements: bp negative-tests
Change-Id: I522c2be227a120a6a714349fa29b31e60b5e0bf4

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