Revert "fix NPE when listvolume if vm got destroyed"
Revert "fix NPE when listvolume if vm got destroyed"

This reverts commit b6518399987a17c791f22b991dcea36d57866269.

wido/cloudstack,wido/cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,mufaddalq/cloudstack-datera-driver,jcshen007/cloudstack,mufaddalq/cloudstack-datera-driver,GabrielBrascher/cloudstack,wido/cloudstack,resmo/cloudstack,GabrielBrascher/cloudstack,DaanHoogland/cloudstack,wido/cloudstack,argv0/cloudstack,resmo/cloudstack,DaanHoogland/cloudstack,mufaddalq/cloudstack-datera-driver,GabrielBrascher/cloudstack,argv0/cloudstack,resmo/cloudstack,DaanHoogland/cloudstack,DaanHoogland/cloudstack,jcshen007/cloudstack,jcshen007/cloudstack,GabrielBrascher/cloudstack,resmo/cloudstack,cinderella/incubator-cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack,mufaddalq/cloudstack-datera-driver,jcshen007/cloudstack,mufaddalq/cloudstack-datera-driver,jcshen007/cloudstack,resmo/cloudstack,wido/cloudstack,jcshen007/cloudstack,resmo/cloudstack,DaanHoogland/cloudstack,argv0/cloudstack,wido/cloudstack,cinderella/incubator-cloudstack,GabrielBrascher/cloudstack,cinderella/incubator-cloudstack,argv0/cloudstack,resmo/cloudstack,cinderella/incubator-cloudstack,mufaddalq/cloudstack-datera-driver,cinderella/incubator-cloudstack,argv0/cloudstack,wido/cloudstack,argv0/cloudstack