Revert "Unify the filebeat and journalbeat indices."

This reverts commit c5571243.

I changed my mind, I'll setup just journalbeat to use the filebeat
indices.

docker-compose.yml

@@ -25,11 +25,8 @@ services:
     command: >
       filebeat setup
       -E output.elasticsearch.hosts=['elasticsearch:9200']
-      -E output.elasticsearch.hosts='logs-%{+yyyy.MM.dd}'
       -E setup.kibana.host=kibana:5601
       -E setup.ilm.overwrite=true
-      -E setup.template.name=logs
-      -E setup.template.pattern='logs-%{+yyyy.MM.dd}'
     image: docker.elastic.co/beats/filebeat-oss:7.12.1
     links: &beat_links
       - elasticsearch