Add logger accessors to DalliStore instance
Add logger accessors to DalliStore instance

ActiveSupport::Cache::Store uses cattr_accessor to set logger, which
creates a public getter/setter for the logger at both the class and
instance level. This patch restores the #logger and #logger= methods
on the DalliStore instance

mrb/dalli,uzzz/dalli,jjb/dalli,retailnext/dalli,arthurnn/dalli,petergoldstein/dalli,joshwlewis/dalli,freeatnet/dalli,danielribeiro/dalli,mperham/dalli,jaxi/dalli,tmm1/dalli,alevy/dalli,dplummer/dalli,ScotterC/dalli,mumoshu/dalli,shaiguitar/dalli,reverbnation/dalli,hbu50/dalli,eileencodes/dalli,cjbottaro/dalli,dtakahas/dalli,wjordan/dalli,sandys/dalli,jwinter/dalli,tlemburg/dalli,murtuzakz/dalli,akihiro17/dalli,sanemat/dalli,hirocaster/dalli,indirect/dalli,linyows/dalli,nitinstp23/dalli,nbibler/dalli,mcansky/dalli,godfat/dalli,mcka1n/dalli,chendo/dalli,leonid-shevtsov/dalli,exact/dalli,petergoldstein/dalli,dannyfallon/dalli,eagletmt/dalli,dblock/dalli,vipulnsward/dalli,indabamusic/dalli,IFTTT/dalli,stefanwille/dalli,jcxplorer/dalli,naseem/dalli,cluesque/dalli