"File not Found" error in check-neutron-lbaasv1-dsvm-api

In https://review.openstack.org/#/c/195223/ (a backport to stable/juno) the jenkins check job failed at the check-neutron-lbaasv1-dsvm-api. Looking at the console.html log, the failure occurred during the test setup phase. The console.log is:

http://logs.openstack.org/23/195223/1/check/check-neutron-lbaasv1-dsvm-api/3394a7e/console.html

The failure is:
   ...
2015-06-25 02:22:54.814 | Running gate_hook
2015-06-25 02:22:54.814 | + gate_hook
2015-06-25 02:22:54.814 | + /opt/stack/new/neutron-lbaas/neutron_lbaas/tests/contrib/gate_hook.sh lbaasv1
2015-06-25 02:22:54.815 | ./safe-devstack-vm-gate-wrap.sh: /opt/stack/new/neutron-lbaas/neutron_lbaas/tests/contrib/gate_hook.sh: No such file or directory
2015-06-25 02:22:54.815 | + GATE_RETVAL=127
2015-06-25 02:22:54.815 | + RETVAL=127
2015-06-25 02:22:54.815 | + '[' 127 -ne 0 ']'
2015-06-25 02:22:54.815 | + echo 'ERROR: the main setup script run by this job failed - exit code: 127'
2015-06-25 02:22:54.815 | ERROR: the main setup script run by this job failed - exit code: 127
2015-06-25 02:22:54.816 | + echo ' please look at the relevant log files to determine the root cause'
2015-06-25 02:22:54.816 | please look at the relevant log files to determine the root cause
2015-06-25 02:22:54.816 | + echo 'Running devstack worlddump.py'
2015-06-25 02:22:54.816 | Running devstack worlddump.py
 ...

Looking at the neutron-lbaas in the stable/juno branch, there is no neutron_lbaas/tests/contrib directory, hence the "No such file or directory" error.