Description of problem:
Import Windows VM (any Windows OS) failed with the next engine.log lines: 

2016-07-26 17:06:34,154 ERROR [org.ovirt.engine.core.bll.exportimport.ImportVmFromExternalProviderCommand] (org.ovirt.thread.pool-6-thread-31) [523a979d] Command 'org.ovirt.engin
e.core.bll.exportimport.ImportVmFromExternalProviderCommand' failed: Coding error, pool for requested GUID does not exist
Version-Release number of selected component (if applicable):
2016-07-26 17:06:34,154 ERROR [org.ovirt.engine.core.bll.exportimport.ImportVmFromExternalProviderCommand] (org.ovirt.thread.pool-6-thread-31) [523a979d] Exception: javax.ejb.EJB
TransactionRolledbackException: Coding error, pool for requested GUID does not exist

and:

2016-07-26 17:06:34,236 INFO  [org.ovirt.engine.core.bll.exportimport.ImportVmFromExternalProviderCommand] (org.ovirt.thread.pool-6-thread-31) [523a979d] Lock freed to object 'En
gineLock:{exclusiveLocks='[17072dbe-cca6-44c4-a8fb-d257e4f106ee=<VM, ACTION_TYPE_FAILED_VM_IS_BEING_IMPORTED$VmName win7_KVM_local>, win7_KVM_local=<VM_NAME, ACTION_TYPE_FAILED_N
AME_ALREADY_USED>]', sharedLocks='null'}'



Version-Release number of selected component (if applicable):
rhevm-4.0.2-0.1.rc.el7ev
qemu-kvm-rhev-2.3.0-31.el7_2.19.x86_64
vdsm-4.18.8-1.el7ev.x86_64
libvirt-daemon-1.2.17-13.el7_2.5.x86_64

How reproducible:
consistently

Steps to Reproduce:
1. Browse webadmin -> Virtual machines tab -> import
2. Select KVM source and enter KVM URI, user and password. click load.
3. Import Windows VM 

Actual results:
Import failed.

Expected results:
Any KVM Windows VM should be importable

Additional info:
engine and vdsm logs attached.