Move decision_maker() call into setUpClass
Move decision_maker() call into setUpClass

Previously the class level call of decision_maker() to detect certain
configuration details for the boto tests was mad in the class
definition. This has issues with unit testing because it requires a
functional config at import time for the file. This commit avoids this
restriction by moving this call into setUpClass for BotoTestCase which
won't try to execute decision_maker() at import.

Change-Id: I8abf4ae109576499fed6b31ae644c1bac58e3350

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