Link to all logs: 

Error snippet from the log:

<error>

ovirtlago.testlib: ERROR: Unhandled exception in <function <lambda> at 0x446a758>
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/ovirtlago/testlib.py", line 217, in assert_equals_within
    res = func()
  File "/home/jenkins/workspace/test-repo_ovirt_experimental_4.1/ovirt-system-tests/basic-suite-4.1/test-scenarios/004_basic_sanity.py", line 449, in <lambda>
    api.vms.get(VM0_NAME).disks.get(disk_name).status.state == 'ok'
AttributeError: 'NoneType' object has no attribute 'state'
lago.utils: ERROR: Error while running thread
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/lago/utils.py", line 57, in _ret_via_queue
    queue.put({'return': func()})
  File "/home/jenkins/workspace/test-repo_ovirt_experimental_4.1/ovirt-system-tests/basic-suite-4.1/test-scenarios/004_basic_sanity.py", line 448, in snapshot_live_merge
    lambda:
  File "/usr/lib/python2.7/site-packages/ovirtlago/testlib.py", line 264, in assert_true_within_long
    assert_equals_within_long(func, True, allowed_exceptions)
  File "/usr/lib/python2.7/site-packages/ovirtlago/testlib.py", line 251, in assert_equals_within_long
    func, value, LONG_TIMEOUT, allowed_exceptions=allowed_exceptions
  File "/usr/lib/python2.7/site-packages/ovirtlago/testlib.py", line 217, in assert_equals_within
    res = func()
  File "/home/jenkins/workspace/test-repo_ovirt_experimental_4.1/ovirt-system-tests/basic-suite-4.1/test-scenarios/004_basic_sanity.py", line 449, in <lambda>
    api.vms.get(VM0_NAME).disks.get(disk_name).status.state == 'ok'
AttributeError: 'NoneType' object has no attribute 'state'

</error>