Suppress unused parameter from PlugSubSet
  modified:   storage/connect/global.h
  modified:   storage/connect/plugutil.cpp
  modified:   storage/connect/jsonudf.cpp
  modified:   storage/connect/tabjson.cpp
  modified:   storage/connect/user_connect.cc

- Fix a bug making column catalog XML tables fail
  modified:   storage/connect/tabxml.cpp

- Comment out wrong message
  modified:   storage/connect/ha_connect.cc

- Update error message when sorting an ODBC table fails
  modified:   storage/connect/tabodbc.cpp

- Add error message when gettting an address
  from an OEM fails.
  modified:   storage/connect/reldef.cpp

- Make some modifications useful for OEM module writting
  Export discovery functions for CSV, JDBC and XML
  Remove unuseful include from tabjson.h
  Move TDBXML::data_charset function from header file to source
  modified:   storage/connect/tabfmt.h
  modified:   storage/connect/tabjson.h
  modified:   storage/connect/tabxml.cpp
  modified:   storage/connect/tabxml.h

- Update test result
  modified:   storage/connect/mysql-test/connect/r/jdbc_oracle.result