Updated with suggestions from Magnus and other fixes and adjustments I found along the way
DbUtil.hpp, DbUtil.cpp:
  fixes and adjustments I found along the way


storage/ndb/test/ndbapi/acrt/NdbRepStress.cpp:
  Updated with suggestions from Magnus and other fixes and adjustments I found along the way
storage/ndb/test/src/DbUtil.cpp:
  fixes and adjustments I found along the way
storage/ndb/test/include/DbUtil.hpp:
  fixes and adjustments I found along the way