store original axis name instead of axis0,1.

Base/Util/StringUtil.cpp

Device/IO/IOFactory.cpp

Device/IO/ParseUtil.cpp

Device/IO/ReadWriteINT.cpp

Tests/ReferenceData/Suite/PolarizedFeNiBilayerTanhPP.int.gz

...s/ReferenceData/Suite/PolarizedFeNiBilayerTanhPP_Q.int.gz