Fix configratuion of rally jobs
Fix configratuion of rally jobs

* Reduce requested resources by rally job
* Remove nested snapshot benchmark cause seems like it has some
  issues not related to cinder

Change-Id: Id38cc0670f081b352e7db2b63e47e156ed277382

cloudbase/cinder,manojhirway/ExistingImagesOnNFS,potsmaster/cinder,ge0rgi/cinder,saeki-masaki/cinder,julianwang/cinder,scality/cinder,nikesh-mahalka/cinder,scottdangelo/RemoveVolumeMangerLocks,eharney/cinder,Paul-Ezell/cinder-1,potsmaster/cinder,rakeshmi/cinder,CloudServer/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,cloudbase/cinder,j-griffith/cinder,nikesh-mahalka/cinder,winndows/cinder,openstack/cinder,saeki-masaki/cinder,mahak/cinder,tlakshman26/cinder-new-branch,JioCloud/cinder,Datera/cinder,tlakshman26/cinder-https-changes,leilihh/cinder,NetApp/cinder,abusse/cinder,sasukeh/cinder,duhzecca/cinder,Datera/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,mahak/cinder,eharney/cinder,rakeshmi/cinder,tlakshman26/cinder-https-changes,Nexenta/cinder,petrutlucian94/cinder,Hybrid-Cloud/cinder,Accelerite/cinder,Hybrid-Cloud/cinder,winndows/cinder,CloudServer/cinder,sasukeh/cinder,dims/cinder,manojhirway/ExistingImagesOnNFS,scality/cinder,openstack/cinder,abusse/cinder,phenoxim/cinder,takeshineshiro/cinder,Accelerite/cinder,takeshineshiro/cinder,nexusriot/cinder,bswartz/cinder,tlakshman26/cinder-new-branch,dims/cinder,j-griffith/cinder,Akrog/cinder,JioCloud/cinder,leilihh/cinder,julianwang/cinder,nexusriot/cinder,duhzecca/cinder,petrutlucian94/cinder,Paul-Ezell/cinder-1,scottdangelo/RemoveVolumeMangerLocks,phenoxim/cinder,Nexenta/cinder,NetApp/cinder,bswartz/cinder,apporc/cinder,Akrog/cinder,apporc/cinder