Merge "Update CentOS7 docker images"

diff --cc jjb/releng-defaults.yaml
index 94c5b1381e05681b868e38466a86265973df1a39,caf385ad662e53691b7834a0d64d1ff5161b6c52..3420591ddbf8c64aa88423682f3be921f654bea7
--- 1/jjb/releng-defaults.yaml
--- 2/jjb/releng-defaults.yaml
+++ b/jjb/releng-defaults.yaml
@@@ -58,13 -58,13 +58,13 @@@
      stack-template: csit-2-instance-type.yaml
      docker_system_count: 1
      docker_system_flavor: 4 GB General Purpose v1
-     docker_system_image: CentOS 7 - docker - 20170120-1434
+     docker_system_image: CentOS 7 - docker - 20170609-0220
      odl_system_count: 1
      odl_system_flavor: 4 GB General Purpose v1
 -    odl_system_image: CentOS 7 - java-builder - 20170607-1706
 +    odl_system_image: CentOS 7 - java-builder - 20170609-0259
      openstack_system_count: 1
      openstack_system_flavor: 8 GB General Purpose v1
 -    openstack_system_image: CentOS 7 - devstack - 20170221-1719
 +    openstack_system_image: CentOS 7 - devstack - 20170609-0220
      tools_system_count: 1
      tools_system_flavor: 2 GB General Purpose v1
      tools_system_image: Ubuntu 14.04 - mininet - 20170210-0439