run_stress.py -h doesn't work without a connection
run_stress.py -h doesn't work without a connection

run_stress.py tries to connect to openstack even though it's just a
--help / -h call. Just moved the import to the corresponding function.

Implements: blueprint stress-tests

Change-Id: Id0f9784a64f3bf53ea91a67452a78d17389d7f51

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