Description of problem:
 In case of VM migration failure, There is no indication for it in events  
 pane, although there is indication for it in tasks pane.
 
Version-Release number of selected component (if applicable):
 Red Hat Enterprise Virtualization Manager Version: 3.5.0-0.13.beta.el6ev

How reproducible:
 100%

Steps to Reproduce:
1. using RHEVM UI, create 2 hosts with RHEL 6.5 
2. Create new VM
3. Migrate VM to second host (Select Host Automatically radio button)
4. Migrate VM back to first host (Select Host Automatically radio button)

Actual results:
 First migration succeeded and second migration failed.
 Observing events pane does not show any indication for this failure.
 Observing tasks pane shows "Migrating VM vm1" executing failure.

Expected results:
 An appropriate message should appear in events pane for indicating VM 
 migration failure.

Additional info:
- Engine log and vdsm.log of both hosts attached.
- First migration failure occured around 2014-Oct-05 13:40 and the second one 
  around 2014-Oct-05, 13:48
- According to VDSM log: Thread-7061::ERROR::2014-10-05 
  13:49:28,329::migration::259::vm.Vm::(run) vmId=`d6f0923d-3da7-4286-    
  b8c2-2b9e476e464e`::Failed to migrate 
  Traceback (most recent call last):
  File "/usr/share/vdsm/virt/migration.py", line 245, in run
  self._startUnderlyingMigration(time.time())
  File "/usr/share/vdsm/virt/migration.py", line 284, in 
  _startUnderlyingMigration
    response['status']['message'])
  RuntimeError: migration destination error: Error creating the requested VM