spec: enable redis on travis

Change-Id: If25a8372575241a1196bf426b7165bc120fa270a
Reviewed-on: https://gerrit.instructure.com/28712
Reviewed-by: Brian Palmer <brianp@instructure.com>
Product-Review: Bryan Madsen <bryan@instructure.com>
QA-Review: Bryan Madsen <bryan@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>

.travis.yml

@@ -1,5 +1,7 @@
 rvm:
   - "1.9.3"
+services:
+  - redis-server
 before_script:
   - find ./config -depth -name "*.yml.example" -exec sh -c 'cp "$1" "${1%.yml.example}.yml"' _ {} \;
   - psql -c 'create database myapp_test;' -U postgres; cp ./config/database.yml.travis ./config/database.yml

config/cache_store.yml.example

@@ -1,3 +1,5 @@
+test:
+  cache_store: redis_store
 development:
   # cache_store: redis_store
   #

config/redis.yml.example

@@ -11,11 +11,11 @@
 #   - redis://redis01
 #   - redis://redis02
 
-# test:
-#   # only tests that are exercising the integration with redis require redis to run.
-#   servers:
-#   - redis://localhost
-#   # warning: the redis database will get cleared before each test, so if you
-#   # use this server for anything else, make sure to set aside a database id for
-#   # these tests to use.
-#   database: 1
+test:
+  # only tests that are exercising the integration with redis require redis to run.
+  servers:
+    - redis://localhost
+  # warning: the redis database will get cleared before each test, so if you
+  # use this server for anything else, make sure to set aside a database id for
+  # these tests to use.
+  database: 1