change teardown check to LOG.error
change teardown check to LOG.error

even with the warning message, this is completely confusing for
people when it shows up in the console logs. Instead lets just
log it at error level.

Change-Id: Iaa3a9d337adcfde9ddf702f8cfab1b9dc74c6559

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