ElasticContainer: Allow to specify the docker container version to create

Instead of always creating the 2.4.6-alpine version, allow to specify
the version.

Keep the existing method, and default to 2.4.6-alpine.

This will allow future changes to add tests against different versions
of Elasticsearch.

Change-Id: I9c7a52cef673a9eac7b2d1bae564e82b886b6727
1 file changed
tree: 680834b175f3d098271f24c98563f3b5ecfb0954
  1. gerrit-elasticsearch/
  2. gerrit-pgm/