Fix a bug in configuration merge.
Fix a bug in configuration merge.

Fix a bug in configuration merge.

jinlmsft/Prajna,jinlmsft/Prajna,jinlmsft/Prajna,MSRCCS/Prajna,BrunoBozza/Prajna,BrunoBozza/Prajna,jinlmsft/Prajna,YuxiaoHu/Prajna,BrunoBozza/Prajna,YuxiaoHu/Prajna,BrunoBozza/Prajna,MSRCCS/Prajna,MSRCCS/Prajna,MSRCCS/Prajna