.travis.yml in curation_concerns-1.7.6 vs .travis.yml in curation_concerns-1.7.7

@@ -1,15 +1,20 @@
 language: ruby
 cache: bundler
 sudo: false
+
 rvm:
   - 2.3.1
+
+services: redis
+
 env:
   global:
   - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
   matrix:
     - RAILS_VERSION=4.2.7.1
       RDF_VERSION=1.99.1
     - RAILS_VERSION=5.0.0.1
       RDF_VERSION=2.1.1
+
 before_script:
   - jdk_switcher use oraclejdk8