2016-09-05 13:42:53,879 DEBUG [org.ovirt.engine.core.utils.timer.FixedDelayJobListener] (DefaultQuartzScheduler1) [] Rescheduling DEFAULT.org.ovirt.engine.core.bll.HaAutoStartVmsRunner.startFailedAutoStartVms#-9223372036854775789 as there is no unfired trigger.
2016-09-05 13:42:54,367 DEBUG [org.ovirt.otopi.dialog.MachineDialogParser] (VdsDeploy) [18598dc8] Got: ***L:ERROR Yum [u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-jsonrpc = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-hook-vmfex-dev = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-python = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-xmlrpc = 4.18.999-484.git8ec9a16.el7.centos']
2016-09-05 13:42:54,367 DEBUG [org.ovirt.otopi.dialog.MachineDialogParser] (VdsDeploy) [18598dc8] nextEvent: Log ERROR Yum [u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-jsonrpc = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-hook-vmfex-dev = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-python = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-xmlrpc = 4.18.999-484.git8ec9a16.el7.centos']
2016-09-05 13:42:54,413 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (VdsDeploy) [18598dc8] Correlation ID: 18598dc8, Call Stack: null, Custom Event ID: -1, Message: Failed to install Host lago_basic_suite_master_host0. Yum [u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-jsonrpc = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-hook-vmfex-dev = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-python = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-xmlrpc = 4.18.999-484.git8ec9a16.el7.centos'].
2016-09-05 13:42:54,413 DEBUG [org.ovirt.otopi.dialog.MachineDialogParser] (VdsDeploy) [18598dc8] Got: ***L:ERROR Failed to execute stage 'Package installation': [u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-jsonrpc = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-hook-vmfex-dev = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-python = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-xmlrpc = 4.18.999-484.git8ec9a16.el7.centos']
2016-09-05 13:42:54,413 DEBUG [org.ovirt.otopi.dialog.MachineDialogParser] (VdsDeploy) [18598dc8] nextEvent: Log ERROR Failed to execute stage 'Package installation': [u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-jsonrpc = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-hook-vmfex-dev = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-python = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-xmlrpc = 4.18.999-484.git8ec9a16.el7.centos']
2016-09-05 13:42:54,428 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (VdsDeploy) [18598dc8] Correlation ID: 18598dc8, Call Stack: null, Custom Event ID: -1, Message: Failed to install Host lago_basic_suite_master_host0. Failed to execute stage 'Package installation': [u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-jsonrpc = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-hook-vmfex-dev = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-python = 4.18.999-484.git8ec9a16.el7.centos', u'vdsm-4.18.999-484.git8ec9a16.el7.centos.x86_64 requires vdsm-xmlrpc = 4.18.999-484.git8ec9a16.el7.centos'].
2016-09-05 13:42:54,428 DEBUG [org.ovirt.otopi.dialog.MachineDialogParser] (VdsDeploy) [18598dc8] Got: ***L:INFO Yum Performing yum transaction rollback
2016-09-05 13:42:54,428 DEBUG [org.ovirt.otopi.dialog.MachineDialogParser] (VdsDeploy) [18598dc8] nextEvent: Log INFO Yum Performing yum transaction rollback
2016-09-05 13:42:54,445 INFO  [org.ovirt.engine.core.dal.dbbroker.auditlo

This happened right after the VDSM PPC64LE builds were published, so I guess they brought new noarch pkg which are now different than x86_64?

[1] http://jenkins.ovirt.org/view/experimental%20jobs/job/test-repo_ovirt_experimental_master/1392/artifact/exported-artifacts/basic_suite_master.sh-fc24/exported-artifacts/test_logs/basic_suite_master/post-002_bootstrap.py/lago_basic_suite_master_engine/_var_log_ovirt-engine/engine.log