vm fails to destroy in the latest

[Alena Prokharchyk]

Hi Wei, 

In the latest DestroyVirtualMachine call fails due to ClassCastException
at com.cloud.vm.UserVmManagerImpl.prepareStop(UserVmManagerImpl.java:4712):

ERROR [cloud.async.AsyncJobManagerImpl] (Job-Executor-2:job-55) Unexpected
exception while executing
org.apache.cloudstack.api.command.user.vm.DestroyVMCmd
java.lang.ClassCastException:
com.cloud.vm.VMInstanceVO$$EnhancerByCGLIB$$8c74c3ed cannot be cast to
com.cloud.vm.UserVmVO
        at 
com.cloud.vm.UserVmManagerImpl.prepareStop(UserVmManagerImpl.java:4712)
        at 
com.cloud.vm.VirtualMachineManagerImpl.advanceStop(VirtualMachineManagerImp
l.java:1168)
        at 
com.cloud.vm.VirtualMachineManagerImpl.destroy(VirtualMachineManagerImpl.ja
va:1285)



Could you please fix it as the problem was introduced with your commit
15265479f644f2745804af456eef9767a7297f01?

Thanks,
Alena.