Conflicting modification for path service-mode-egress

Seen in https://logs.opendaylight.org/releng/jenkins092/netvirt-csit-1node-openstack-newton-nodl-v2-upstream-stateful-nitrogen/149/odl1_karaf.log.gz

org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.ServiceModeEgress
2017-07-25 01:51:48,353 | INFO | nPool-1-worker-0 | sedEgressServicesStateBindHelper | 230 - org.opendaylight.genius.interfacemanager-impl - 0.3.0.Nitrogen | bind all egress services for interface: 102195142633585:br-physnet1-pa:1235
2017-07-25 01:51:48,355 | WARN | rd-dispatcher-38 | ShardDataTree | 210 - org.opendaylight.controller.sal-distributed-datastore - 1.6.0.Nitrogen | member-1-shard-default-operational: Store Tx member-1-datastore-operational-fe-0-txn-2928-0: Conflicting modification for path /(urn:opendaylight:genius:interfacemanager:servicebinding?revision=2016-04-06)bound-services-state-list/bound-services-state/bound-services-state[

{(urn:opendaylight:genius:interfacemanager:servicebinding?revision=2016-04-06)interface-name=102195142633585:br-physnet1-pa:1235, (urn:opendaylight:genius:interfacemanager:servicebinding?revision=2016-04-06)service-mode=(urn:opendaylight:genius:interfacemanager:servicebinding?revision=2016-04-06)service-mode-egress}

].

Test case where exception is seen is:
suites: openstack/connectivity/01_l2_tests.robot
Test: Create Subnets For l2_network_1