Rename validation type for clarity

Author: avit

lib/ice_cube/validations/count.rb

@@ -26,7 +26,7 @@ def initialize(count, rule)
       end
 
       def type
-        :dealbreaker
+        :limit
       end
 
       def validate(time, schedule)

lib/ice_cube/validations/until.rb

@@ -26,7 +26,7 @@ def initialize(time)
       end
 
       def type
-        :dealbreaker
+        :limit
       end
 
       def validate(step_time, schedule)