update configuration files that use ES local mode

JanusGraph 0.2.0 added support for Elasticsearch `REST_CLIENT` and removed support for the previous options (`TRANSPORT_CLIENT`, `NODE`). Need to go through the shipped configuration files and update them so they use the supported connection method. Also verify various parts of the documentation to ensure that there are no more usages of the previous options.

Search the shipped configuration files and documentation for TRANSPORT_CLIENT and NODE, then inspect each occurrence in the context of the Elasticsearch connection settings. Update the affected configurations to use REST_CLIENT and verify that no usages of the removed options remain.

Written by the indexing model from the issue text.