Merge pull request #28 from nickbabcock/update-ci

CI: set graphite tagdb to redis explicitly

ci/Dockerfile.graphite

@@ -1,2 +1,2 @@
-FROM graphiteapp/graphite-statsd
+FROM graphiteapp/graphite-statsd:1.1.4-10
 COPY local_settings.py /opt/graphite/webapp/graphite/

ci/local_settings.py

@@ -1,3 +1,4 @@
+TAGDB = 'graphite.tags.redis.RedisTagDB'
 TAGDB_REDIS_HOST = 'redis'
 TAGDB_REDIS_PORT = 6379
 TAGDB_REDIS_DB = 0