Added a test to address issue 2500: case of inquiring variables by writing as used by users - formatting
Added a test to address issue 2500: case of inquiring variables by writing as used by users - formatting

JasonRuonanWang/ADIOS2,JasonRuonanWang/ADIOS2,JasonRuonanWang/ADIOS2,JasonRuonanWang/ADIOS2,ornladios/ADIOS2,ornladios/ADIOS2,ornladios/ADIOS2,JasonRuonanWang/ADIOS2,ornladios/ADIOS2,ornladios/ADIOS2