Housekept.
 T DUMPING IdxDbMgr singleton instance: BEGIN
 T   o cpixDir_: c:\Data\indexing\indexdb
 T   o regFilePath_: c:\Data\cpixreg.txt
 T   o qbacs_:
 T   o idxDb_:
 T   o multiIdxDb_:
 T DUMPING IdxDbMgr singleton instance: END.
