Incorrect error message for ADIOS2_USE_ENDIAN_REVERSE=ON

Created by: NAThompson

The following error messages:

 ➜  ADIOS2 git:(master) ✗ grep -nr -B 2 -A 1 'ADIOS2_USE_ENDIAN_REVERSE=ON' .
./source/adios2/toolkit/format/bp4/BP4Deserializer.cpp-73-                "ERROR: reader found BigEndian bp file, "
./source/adios2/toolkit/format/bp4/BP4Deserializer.cpp-74-                "this version of ADIOS2 wasn't compiled "
./source/adios2/toolkit/format/bp4/BP4Deserializer.cpp:75:                "with the cmake flag -DADIOS2_USE_ENDIAN_REVERSE=ON "
./source/adios2/toolkit/format/bp4/BP4Deserializer.cpp-76-                "explicitly, in call to Open\n");
--
--
./source/adios2/toolkit/format/bp3/BP3Deserializer.cpp-83-                "ERROR: reader found BigEndian bp file, "
./source/adios2/toolkit/format/bp3/BP3Deserializer.cpp-84-                "this version of ADIOS2 wasn't compiled "
./source/adios2/toolkit/format/bp3/BP3Deserializer.cpp:85:                "with the cmake flag -DADIOS2_USE_ENDIAN_REVERSE=ON "
./source/adios2/toolkit/format/bp3/BP3Deserializer.cpp-86-                "explicitly, in call to Open\n");

suggests use of incorrect cmake flags:

$ cmake -DADIOS2_USE_ENDIAN_REVERSE=ON 
  Build Options:
      ...
      Endian_Reverse: OFF


CMake Warning:
  Manually-specified variables were not used by the project:

    ADIOS2_USE_ENDIAN_REVERSE

It seemed to me that a natural fix would be using -DEndian_Reverse=ON, but this didn't work either.