fix CLOUDSTACK-1944 Destruction of a VM with StaticNAT/FW throws a NullPointerException during VM Expunge
fix CLOUDSTACK-1944 Destruction of a VM with StaticNAT/FW throws a NullPointerException during VM Expunge

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