Randomly missing nodes in Inventory

Ever now and then we're getting missing nodes in topology manager.

Example [1]
https://jenkins.opendaylight.org/integration/job/integration-master-csit-karaf-compatible-all/266/robot/report/report.html#suite_s1-s4-s1
Log [1]
https://jenkins.opendaylight.org/integration/job/integration-master-csit-karaf-compatible-all/266/artifact/karaf.log
2014-09-26 15:23:07,544

Example [2]
https://jenkins.opendaylight.org/integration/job/integration-master-csit-karaf-compatible-min/127/robot/report/report.html#suite_s1-s1-s2
https://jenkins.opendaylight.org/integration/job/integration-master-csit-karaf-compatible-min/127/artifact/karaf.log
2014-09-26 07:48:07,901

Example [3]
https://jenkins.opendaylight.org/integration/job/integration-master-csit-karaf-compatible-min/131/robot/report/report.html#suite_s1-s1
Log [3]
https://jenkins.opendaylight.org/integration/job/integration-master-csit-karaf-compatible-min/131/artifact/karaf.log

2014-09-26 12:03:37,408