Merge pull request #640 from splitrb/reduce-extra-hset-call

Single HSET to update values, instead of multiple ones.

Author: andrehjr

lib/split/experiment.rb

@@ -80,8 +80,8 @@ def save
         persist_experiment_configuration
       end
 
-      redis.hset(experiment_config_key, :resettable, resettable)
-      redis.hset(experiment_config_key, :algorithm, algorithm.to_s)
+      redis.hset(experiment_config_key, :resettable, resettable,
+                                        :algorithm, algorithm.to_s)
       self
     end