Merge pull request #5 from kyler-instructure/add_specific_build_time

Add specific build time

lib/rspecq/queue.rb

@@ -210,6 +210,7 @@ module RSpecQ
       @redis.multi do
         @redis.lpush(key_build_times, Float(duration))
         @redis.ltrim(key_build_times, 0, 99)
+        @redis.set(key_build_time, Integer(duration * 1000))
       end
     end
 
@@ -407,6 +408,10 @@ module RSpecQ
       "build_times"
     end
 
+    def key_build_time
+      key("build_time")
+    end
+
     private
 
     def key(*keys)