Fix typos in Compose and Travis files

.travis.yml

@@ -31,4 +31,4 @@ script:
   - sleep 30
   - docker-compose logs
   - curl --retry 10 --retry-delay 5 -D- http://localhost:9200/
-  - curl --retry 10 --retry-delay 5 -ID-v http://localhost:5601/
+  - curl --retry 10 --retry-delay 5 -I http://localhost:5601/

docker-compose.yml

@@ -20,7 +20,7 @@ services:
       context: logstash/
     volumes:
       - ./logstash/config/logstash.yml:/usr/share/logstash/config/logstash.yml:ro
-      - ./logstash/pipeline:/usr/share/logstash/pipeline
+      - ./logstash/pipeline:/usr/share/logstash/pipeline:ro
     ports:
       - "5000:5000"
     environment: