[galaxy-dev] A new tool_data_table_conf.xml created under tool-data directory

Hi guys, After installing the BWA from the Tools Shed, I find there is a new tool_data_table_conf.xml got created under tool-data directory. The file contains the entries of BWA's loc files. I believe the installed BWA still relies on the tool_data_table_conf.xml under galaxy root dir. Anyone can clarify what the one under tool-data dir is for? Regards, Derrick