[config] Add default value for ZK chroot
[config] Add default value for ZK chroot

pinterest/secor,TiVo/secor,yieldbot/secor,optimizely/secor,optimizely/secor,damaex17/secor,nguyenvanthan/secor,HelixEducation/secor,ankurcha/secor,smorin/secor,evertrue/secor,Smartling/secor,jon-wei/secor,shawnsnguyen/secor,TiVo/secor,burtcorp/secor,ferguskelledy/secor,smorin/secor,Aloomaio/secor,jgagnon1/secor,FundingCircle/secor,ilimi-in/secor,ankurcha/secor,helpshift/secor,HelixEducation/secor,morrifeldman/secor,onespot/secor,ppearcy/secor,opentable/secor,opentable/secor,pinterest/secor,jgagnon1/secor,Smartling/secor,adgear/secor,shawnsnguyen/secor,nguyenvanthan/secor,yieldbot/secor,HenryCaiHaiying/secor,canopusconsulting/secor,ilimi-in/secor,edwardt/secor,Aloomaio/secor,jon-wei/secor,strava/secor,liamstewart/secor,hamedhsn/secor,ppearcy/secor,strava/secor,liamstewart/secor,damaex17/secor,canopusconsulting/secor,edwardt/secor,adgear/secor,ferguskelledy/secor,burtcorp/secor,FundingCircle/secor,helpshift/secor,hamedhsn/secor,morrifeldman/secor,onespot/secor,HenryCaiHaiying/secor,evertrue/secor