Release Elastic 5.6.9 image w/bundled Fabric8 elasticsearch-cloud-kubernetes plugin

[ron1]

Fabric8 elasticsearch-cloud-kubernetes plugin 5.6.9 is now available (http://search.maven.org/remotecontent?filepath=io/fabric8/elasticsearch-cloud-kubernetes/5.6.9/elasticsearch-cloud-kubernetes-5.6.9.jar). Consider releasing Elastic 5.6.x images as long as Elastic continues to support 5.6.x branch.

[PatrickHuetter]

+1 5.6.8 would also be nice