Upgrade to RHEVm 3.0 to RHEVm 3.1 fails with yum issues

Issue

• Upgrade fails with the following message:

To track the installation process run tail -f /var/log/yum.log in another session).
Note that the transition from package removal to package installation is expected
to take a significant amount of time. No output will appear in the log file during
this transition.... [ ERROR ]
Restoring Database...                                    [ DONE ]
Skipping yum rollback
Starting ovirt-engine...                                 [ ERROR ]

 **Error: Upgrade failed, rolling back**
 **Reason: Error: Upgrade failed**

• When looking at `/var/log/ovirt-engine/ovirt-engine-upgrade file, we can see the failure occur:

Complete!

2013-01-24 15:13:56::DEBUG::common_utils::378::root:: stderr = 
2013-01-24 15:13:56::DEBUG::common_utils::379::root:: retcode = 0
2013-01-24 15:13:56::DEBUG::upgrade_utils30::216::root:: Yum install started
2013-01-24 15:13:56::DEBUG::common_utils::339::root:: Executing command --> '/usr/bin/yum install -q -y rhevm rhevm-backend rhevm-config rhevm-dbscripts rhevm-genericapi rhevm-notification-service rhevm-restapi rhevm-setup rhevm-tools-common rhevm-userportal rhevm-webadmin-portal rhevm-image-uploader rhevm-iso-uploader rhevm-log-collector vdsm-bootstrap'
2013-01-24 15:14:10::DEBUG::common_utils::377::root:: output = Package xml-commons-apis is obsoleted by xml-commons-jaxp-1.3-apis, but obsoleting package does not provide for requirements
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

2013-01-24 15:14:10::DEBUG::common_utils::378::root:: stderr = Error: Package: jbosssx2-2.0.5-8.3.SP3_1.ep5.el6.noarch (jbappplatform-5-x86_64-server-6-rpm)
           Requires: jaxb_2_1_api
           Available: glassfish-jaxb-2.1.12-9.ep5.el6.noarch (jbappplatform-5-x86_64-server-6-rpm)
               jaxb_2_1_api = 2.1.12-9.ep5.el6
           Available: glassfish-jaxb-2.1.12-10_patch_02.ep5.el6.noarch (jbappplatform-5-x86_64-server-6-rpm)
               jaxb_2_1_api = 2.1.12-10_patch_02.ep5.el6
           Available: glassfish-jaxb-2.1.12-12_patch_03.ep5.el6.noarch (jbappplatform-5-x86_64-server-6-rpm)
               jaxb_2_1_api = 2.1.12-12_patch_03.ep5.el6
           Available: glassfish-jaxb-2.2.5-4_redhat_1.ep6.el6.noarch (jbappplatform-6-x86_64-server-6-rpm)
               Not found
           Installing: glassfish-jaxb-2.2.5-10_redhat_3.ep6.el6.noarch (jbappplatform-6-x86_64-server-6-rpm)
               Not found
Error: Package: 1:mx4j-3.0.1-12.ep5.el6.noarch (jbappplatform-5-x86_64-server-6-rpm)
           Requires: xml-commons
           Available: xml-commons-1.3.04-7.14.ep5.el6.noarch (jbappplatform-5-x86_64-server-6-rpm)
               xml-commons = 1.3.04-7.14.ep5.el6
           Available: xml-commons-1.3.04-8.2_patch_01.ep5.el6.noarch (jbappplatform-5-x86_64-server-6-rpm)
               xml-commons = 1.3.04-8.2_patch_01.ep5.el6
           Available: xml-commons-apis-1.3.04-3.6.el6.x86_64 (rhel-x86_64-server-6)
               xml-commons = 1.3.04-3.6.el6

2013-01-24 15:14:10::DEBUG::common_utils::379::root:: retcode = 1
2013-01-24 15:14:10::ERROR::upgrade_utils30::224::root:: Traceback (most recent call last):
  File "/usr/share/ovirt-engine/scripts/upgrade_utils30.py", line 218, in upgrade
  File "/usr/share/ovirt-engine/scripts/common_utils.py", line 382, in execCmd
Exception: Error: Yum update failed

2013-01-24 15:14:10::ERROR::rhevm-upgrade::1341::root:: Traceback (most recent call last):
  File "/usr/bin/rhevm-upgrade", line 1309, in main
  File "/usr/bin/rhevm-upgrade", line 676, in runFunc
  File "/usr/share/ovirt-engine/scripts/upgrade_utils30.py", line 234, in upgrade
Exception: Error: Upgrade failed

2013-01-24 15:14:10::ERROR::rhevm-upgrade::1342::root:: Rolling back update
2013-01-24 15:14:10::DEBUG::rhevm-upgrade::689::root:: Verifing update is related to db
2013-01-24 15:14:10::DEBUG::rhevm-upgrade::699::root:: isUpdateRelatedToDb value is True
2013-01-24 15:14:10::DEBUG::rhevm-upgrade::560::root:: DB Restore started
2013-01-24 15:14:10::DEBUG::common_utils::339::root:: Executing command --> '/usr/bin/dropdb -U postgres -h localhost -p 5432 engine_2013_01_24_15_08_35'
2013-01-24 15:14:11::DEBUG::common_utils::377::root:: output = 
2013-01-24 15:14:11::DEBUG::common_utils::378::root:: stderr = 
2013-01-24 15:14:11::DEBUG::common_utils::379::root:: retcode = 0
2013-01-24 15:14:11::DEBUG::common_utils::339::root:: Executing command --> '/usr/bin/psql -U postgres -h localhost -p 5432 -d template1 -f /var/lib/ovirt-engine/backups/ovirt-engine_db_backup_2013_01_24_15_08_35.sql'
2013-01-24 15:14:20::DEBUG::common_utils::377::root:: output = SET