[Users] Engine upgrade failure broken in master

Commit: 72a51f5e21f38bf259a460948670eac92e97ca24 Breaks engine upgrades: 2013-01-29 12:40:52::ERROR::engine-upgrade::1177::root:: Traceback (most recent call last): File "/usr/bin/engine-upgrade", line 1170, in <module> main(options) File "/usr/bin/engine-upgrade", line 1071, in main if zombieTasksFound(): File "/usr/bin/engine-upgrade", line 766, in zombieTasksFound msg="Can't get zombie async tasks", File "/usr/share/ovirt-engine/scripts/common_utils.py", line 459, in execCmd env=env, File "/usr/lib64/python2.7/subprocess.py", line 679, in __init__ errread, errwrite) File "/usr/lib64/python2.7/subprocess.py", line 1249, in _execute_child raise child_exception OSError: [Errno 8] Exec format error Upgrade was attempted on engine built from commit: 61c11aecc40e755d08b6c34c6fe1c0a07fa94de8 Building from commit: 82bdc46dfdb46b000f67f0cd4e51fc39665bf13b and upgrading works as expected. - DHC