Description of problem:
virt-manager should not report error after deleting a transient domain

Version-Release number of selected component (if applicable):
virt-manager-1.4.3-2.el7.noarch

How reproducible:
100%

Steps to Reproduce:
1. Create a transient domain with an existing xml file.
# virsh create test.xml 
Domain ESX4.1 created from test.xml

# virsh dominfo ESX4.1
Id:             31
Name:           ESX4.1
UUID:           94c96c33-6433-4fde-aebb-2fed6b964f5e
OS Type:        hvm
State:          running
CPU(s):         1
CPU time:       7.4s
Max memory:     1048576 KiB
Used memory:    1048576 KiB
Persistent:     no
Autostart:      disable
Managed save:   no
Security model: selinux
Security DOI:   0
Security label: system_u:system_r:svirt_t:s0:c928,c1001 (enforcing)

2. Launch virt-manager.
# virt-manager

3. Delete domain ESX4.1. (Select 'ESX4.1', then right click it, select 'Delete'.)

Actual results:
After step3, 'Delete Virtual Machine' window pops up, click 'Delete' button.
We can see domain ESX4.1 has been deleted, but there always leaves some error message like:

Error deleting virtual machine 'ESX4.1': Domain not found: no domain with matching uuid '94c96c33-6433-4fde-aebb-2fed6b964f5e' (ESX4.1)

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/delete.py", line 185, in _async_delete
    self.vm.delete()
  File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 82, in newfn
    ret = fn(self, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/domain.py", line 1533, in delete
    self._backend.undefine()
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 2694, in undefine
    if ret == -1: raise libvirtError ('virDomainUndefine() failed', dom=self)
libvirtError: Domain not found: no domain with matching uuid '94c96c33-6433-4fde-aebb-2fed6b964f5e' (ESX4.1)


Additionally, there were errors removing certain storage devices: 


Expected results:
No error reports after deleting transient domain.

Additional info: