kolla-build failing on centos7 with parent_error

[Dave Walker]

kolla-build seems to be failing to build a non-deterministic number of containers with a 'parent_error'.

..
ERROR:kolla.cmd.build:aodh-expirer Failed with status: error
ERROR:kolla.cmd.build:nova-api Failed with status: parent_error
ERROR:kolla.cmd.build:cinder-base Failed with status: parent_error
ERROR:kolla.cmd.build:swift-container Failed with status: parent_error
ERROR:kolla.cmd.build:designate-api Failed with status: parent_error
ERROR:kolla.cmd.build:kolla-toolbox Failed with status: error
ERROR:kolla.cmd.build:heat-engine Failed with status: parent_error
ERROR:kolla.cmd.build:gnocchi-base Failed with status: parent_error
ERROR:kolla.cmd.build:openvswitch-vswitchd Failed with status: error
ERROR:kolla.cmd.build:nova-network Failed with status: parent_error
ERROR:kolla.cmd.build:trove-base Failed with status: parent_error
ERROR:kolla.cmd.build:heat-api-cfn Failed with status: parent_error
ERROR:kolla.cmd.build:aodh-base Failed with status: error
..

Attached is a console.log of running:
$ docker images
$ kolla-build -n test --registry 10.25.201.83:4000 --push
$ docker images

[Dave Walker (davewalker)]

Running with pip installed via local checkout of:
commit 4db24f490079697edab176b7f78a1157a2fb150b
Merge: 162fa25 9774ca9
Author: Jenkins <email address hidden>
Date: Fri May 27 21:21:15 2016 +0000

    Merge "Add support for murano binary containers for rpm based distros"

[zhubingbing (zhubingbing)]

you can test in master branch, i test look so good
@ip-172-31-22-78:# kolla-build -n test
@ip-172-31-22-78:# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
kolla/centos-binary-tempest 3.0.0 0f48bdad9485 About an hour ago 1.491 GB
52.196.228.195:4000/kolla/centos-source-neutron-vpnaas-agent 3.0.0 39e7ccc67703 4 days ago 937.2 MB
52.196.228.195:4000/kolla/centos-source-neutron-base 3.0.0 85b877c25d58 4 days ago 934.4 MB
kolla/centos-source-neutron-vpnaas-agent 3.0.0 c238a5a16aa6 5 days ago 937.2 MB
kolla/centos-source-neutron-base 3.0.0 ea8de6fd4b0c 5 days ago 934.4 MB
52.196.228.195:4000/kolla/centos-source-openstack-base 3.0.0 c2844ff1ea02 5 days ago 628.1 MB
kolla/centos-source-openstack-base 3.0.0 c2844ff1ea02 5 days ago 628.1 MB
52.196.228.195:4000/kolla/centos-source-base 3.0.0 eba1c055ea84 5 days ago 315.2 MB
kolla/centos-source-base 3.0.0 eba1c055ea84 5 days ago 315.2 MB