Add action.auto_create_index false

I believe the lack of this option is causing on ACME the following error in CI:

|   1) Ems::Speaker behaves like an indexable coyote document synchronous indexing should require that an index exists
|      Failure/Error: DEFAULT_FAILURE_NOTIFIER = lambda { |failure, _opts| raise failure }
|        expected Elasticsearch::Transport::Transport::Errors::NotFound but nothing was raised

This should hopefully resolve that.

Author: mzagaja

entrypoint.sh

@@ -33,6 +33,7 @@ if [ "x${MAJOR_VERSION}" == 'x6' ]; then
     --env "ES_JAVA_OPTS=-Xms1g -Xmx1g" \
     --env "xpack.security.enabled=false" \
     --env "xpack.license.self_generated.type=basic" \
+    --env "action.auto_create_index=false" \
     --ulimit nofile=65536:65536 \
     --ulimit memlock=-1:-1 \
     --publish "9200:9200" \