driver.py should log errors when ssh operations fail
driver.py should log errors when ssh operations fail

Improve error_handling for do_ssh function, by adding log when error

 Closes-Bug: #1230010

Change-Id: I6e5c7f8de36ace9f9a1b5686c92a3dfa53a450f2

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