add config test for traversal through chain of parents.
add config test for traversal through chain of parents.

nju520/pry,caporta/pry,bronzdoc/pry,shockone/pry,jasonm23/pry,shockone/pry,pvdb/pry,ooohiroyukiooo/pry,sferik/pry,jasonm23/pry,85x14/pry,nju520/pry,jasnow/pry,printercu/pry,ngpestelos/pry,pvdb/pry,jasonm23/pry,raeno/pry,caporta/pry,85x14/pry,gfvcastro/pry,raeno/pry,ooohiroyukiooo/pry,icebreaker/pry,scalixte-mdsol/pry,gfvcastro/pry,nju520/pry,scalixte-mdsol/pry,bronzdoc/pry,ooohiroyukiooo/pry,raeno/pry,tdg5/pry,josue804/debunker,sideci-sample/sideci-sample-pry,tdg5/pry,85x14/pry,scalixte-mdsol/pry,caporta/pry,tdg5/pry,sferik/pry,icebreaker/pry,geoffreylitt/pry,shockone/pry,jasnow/pry,josue804/debunker,geoffreylitt/pry,jasnow/pry,ngpestelos/pry,printercu/pry