Merge pull request #4792 from mrsolo/master

build randomization, modify how local mode is run
Add transport.publish_port setting

Add transport.publish_port setting to allow users to specify the port
other cluster members should use when connecting to an instance. This
is needed for systems such as OpenShift, where cluster communication
needs to use a publicly accessibly proxy port, because the normal port
(9300) is bound to a private loopback IP address.
Add documentation for transport.publish_port
Fix HistogramAggregationSearchBenchmark.
[SPEC] path without {index} is not allowed for indices.open api