* Add src parameter to elasticsearch_plugin
Previously specifying a URL or a file name (which is supported by the
Elasticsearch plugin tooling) would not work correctly with Ansible, because the
detection of the current installation state did not handle this well.
This commit adds a new "src" parameter for the module, which can be specified in
addition to the plugin name. It will be used to retrieve the plugin from
a custom location while keeping the final plugin name available to determine if
it is already present or not.
The url parameter remains for ES 1.x compatiblity.
* Fix sanity test errors
* Add version_added for src option
* Increase first added version to 2.7
40b1ecf38a