Add -dieif support to run_kvm and wait_for_kvm.
Add -dieif support to run_kvm and wait_for_kvm.

If running $dieif returns 0, the VM will be killed and wait_for_kvm will return 1.

rhafer/crowbar,MaximilianMeister/crowbar,crowbar/crowbar,aspiers/crowbar,rhafer/crowbar,rhafer/crowbar,mmnelemane/crowbar,nkrinner/crowbar,tserong/crowbar,tserong/crowbar,toabctl/crowbar,dirkmueller/crowbar,vwallfahrer/crowbar,MaximilianMeister/crowbar,SUSE-Cloud/crowbar,toabctl/crowbar,crowbar/crowbar,SUSE-Cloud/crowbar,mmnelemane/crowbar,rsalevsky/crowbar,dirkmueller/crowbar,aplanas/crowbar,nkrinner/crowbar,rsalevsky/crowbar,aplanas/crowbar,aspiers/crowbar,vwallfahrer/crowbar