Fix containers with expired objects deletion problem
Fix containers with expired objects deletion problem

This fix adds a try/except statement around delete object function,
in order to be sure that even if one of the objects that is listed
in container is expired/is not found the containers will still
be deleted.

Change-Id: Ie49ce66304aefcb8264001b811859c8768e61fc7
Closes-Bug: #1281599

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