Description of problem:
Upgrade from 3.3.4 to 3.4 RC failed 

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. install ovirt-engine with the following repo
[ovirt-3.3.4]
name=oVirt 3.3.4 release
baseurl=http://ovirt-mirror.eng.lab.tlv.redhat.com/releases/3.3.4/rpm/EL/$releasever/
enabled=1
skip_if_unavailable=1
gpgcheck=0

2. Installation succeeded 
3. Run engine-setup
4. engine-setup completes OK (test by opening webadmin)
5. set enabled=0 for the repo definition in 1)
6. Add another entry to this repo :
[ovirt-3.4.0-prerelease]
name=Pre release builds of the oVirt 3.4 project
#baseurl=http://resources.ovirt.org/releases/3.4.0_pre/rpm/EL/$releasever/
baseurl=http://ovirt-mirror.eng.lab.tlv.redhat.com/releases/3.4.0_pre/rpm/EL/$releasever/
enabled=1
skip_if_unavailable=1
gpgcheck=0
7. run : yum update ovirt-engine-setup
8. run engine-setup


[root@localhost yum.repos.d]# engine-setup 
[ INFO  ] Stage: Initializing
[ INFO  ] Stage: Environment setup
          Configuration files: ['/etc/ovirt-engine-setup.conf.d/10-packaging.conf', '/etc/ovirt-engine-setup.conf.d/20-setup-ovirt-post.conf']
          Log file: /var/log/ovirt-engine/setup/ovirt-engine-setup-20140306085756.log
          Version: otopi-1.2.0_beta (otopi-1.2.0-0.1.beta.el6)
[ INFO  ] Stage: Environment packages setup
[ INFO  ] Stage: Programs detection
[ INFO  ] Stage: Environment setup
[ INFO  ] Stage: Environment customization
         
          --== PRODUCT OPTIONS ==--
         
         
          --== PACKAGES ==--
         
[ INFO  ] Checking for product updates...
          Setup has found updates for some packages, do you wish to update them now? (Yes, No) [Yes]: 
[ INFO  ] Checking for an update for Setup...
          Setup will not be able to rollback new packages in case of a failure, because installed ones were not found in enabled repositories.
          Do you want to abort Setup? (Yes, No) [Yes]: 
[ ERROR ] Failed to execute stage 'Environment customization': Package rollback information is unavailable
[ INFO  ] Stage: Clean up
          Log file is located at /var/log/ovirt-engine/setup/ovirt-engine-setup-20140306085756.log
[ INFO  ] Stage: Pre-termination
[ INFO  ] Stage: Termination
[ ERROR ] Execution of setup failed



Actual results:
Upgrade from 3.3.4 to 3.4 fails

Expected results:
Upgrade from 3.3.4 to 3.4 should succeed 

Additional info:

log file