Create and delete flavor as regular user
Create and delete flavor as regular user

The new negative test cases are trying to perform compute admin
 operations as regular user.
Regular user should not be able to create or delete flavor.

Change-Id: Icec59ba9e39b8a9c9ea93e5e633989c962f42e33

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