CI: enable testing with real Redis server

Author: kares

.ci/run.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+# This is intended to be run inside the docker container as the command of the docker-compose.
+
+env
+
+set -ex
+
+jruby -rbundler/setup -S rspec -fd
+
+jruby -rbundler/setup -S rspec -fd --tag redis

.travis.yml

@@ -1,2 +1,5 @@
 import:
-- logstash-plugins/.ci:travis/[email protected]
+- logstash-plugins/.ci:travis/[email protected]
+
+services:
+  - redis-server