server: fix resource count updated unmanage vm

Do not decrement resource count for a running VM twice while unmanaging.

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

Author: shwstppr

server/src/main/java/com/cloud/vm/UserVmManagerImpl.java

@@ -8208,18 +8208,22 @@ private void postProcessingUnmanageVM(UserVmVO vm) {
         Long cpu = offering.getCpu() != null ? new Long(offering.getCpu()) : 0L;
         Long ram = offering.getRamSize() != null ? new Long(offering.getRamSize()) : 0L;
         // First generate a VM stop event if the VM was not stopped already
+        boolean resourceCountNotDecremented = true;
         if (vm.getState() != State.Stopped) {
             UsageEventUtils.publishUsageEvent(EventTypes.EVENT_VM_STOP, vm.getAccountId(), vm.getDataCenterId(),
                     vm.getId(), vm.getHostName(), vm.getServiceOfferingId(), vm.getTemplateId(),
                     vm.getHypervisorType().toString(), VirtualMachine.class.getName(), vm.getUuid(), vm.isDisplayVm());
             resourceCountDecrement(vm.getAccountId(), vm.isDisplayVm(), cpu, ram);
+            resourceCountNotDecremented = false;
         }
 
         // VM destroy usage event
         UsageEventUtils.publishUsageEvent(EventTypes.EVENT_VM_DESTROY, vm.getAccountId(), vm.getDataCenterId(),
                 vm.getId(), vm.getHostName(), vm.getServiceOfferingId(), vm.getTemplateId(),
                 vm.getHypervisorType().toString(), VirtualMachine.class.getName(), vm.getUuid(), vm.isDisplayVm());
-        resourceCountDecrement(vm.getAccountId(), vm.isDisplayVm(), cpu, ram);
+        if (resourceCountNotDecremented) {
+            resourceCountDecrement(vm.getAccountId(), vm.isDisplayVm(), cpu, ram);
+        }
     }
 
     /*