For example in this build
https://jenkins.opendaylight.org/releng/view/bgpcep/job/bgpcep-integration-master/204/
this is logged:

2015-03-10 13:52:04,103 | INFO | n(3)-10.30.11.46 | SingleFeatureTest | 84 - PAXEXAM-PROBE-ba463c33-0aa4-4720-881e-5961947aab78 - 0.0.0 | Attempting to install feature odl-bgpcep-pcep-topology-provider 0.4.0-SNAPSHOT
2015-03-10 13:52:13,851 | INFO | n(3)-10.30.11.46 | SingleFeatureTest | 84 - PAXEXAM-PROBE-ba463c33-0aa4-4720-881e-5961947aab78 - 0.0.0 | Successfull installed feature odl-bgpcep-pcep-topology-provider 0.4.0-SNAPSHOT
2015-03-10 13:52:14,467 | WARN | FelixShutdown | core | 80 - org.apache.aries.jmx.core - 1.1.2 | Task rejected for JMX Notification dispatch of event [org.osgi.framework.ServiceEvent[source=[javax.management.MBeanServer]]] - Dispatcher may have been shutdown
2015-03-10 13:52:15,341 | ERROR | config-pusher | TransactionProvider | 153 - org.opendaylight.controller.config-netconf-connector - 0.3.0.SNAPSHOT | Exception while commit of org.opendaylight.controller:TransactionName=ConfigTransaction-54-56,type=ConfigTransaction, aborting transaction
org.opendaylight.controller.config.api.ConflictingVersionException: Optimistic lock failed. Expected parent version 57, was 54

(followed by a long stacktrace)
I believe that it would be good to filter out such errors,
as they do not change the fact that feature has passed the test
and they decrease readability of the console log.