Fix issue with pep8 gate job
Fix issue with pep8 gate job

Since test-scenario is working on import level the configuration is
may not in place. This causes an error in the pep8 job.

Change-Id: I761c82338eb513a4870b2e3cdf6ab7e98790b6f4
Implements: bug 1291826

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