[Openstack-stable-maint] Stable check of openstack/congress failed

Build failed. - periodic-congress-docs-newton http://logs.openstack.org/periodic-stable/periodic-congress-docs-newton/0247... : SUCCESS in 4m 35s - periodic-congress-python27-newton http://logs.openstack.org/periodic-stable/periodic-congress-python27-newton/... : FAILURE in 2m 25s - periodic-congress-docs-ocata http://logs.openstack.org/periodic-stable/periodic-congress-docs-ocata/46354... : SUCCESS in 2m 40s - periodic-congress-python27-ocata http://logs.openstack.org/periodic-stable/periodic-congress-python27-ocata/6... : SUCCESS in 7m 58s