engine%type is always BPFile

Created by: pnorbert

No matter what the engine is, this fortran structure member is always BPFile:

    call adios2_open (bp_writer, io, filename, adios2_mode_write, adios2_err)
    ! For information purposes only:
    if (rank == 0) then
        print '("Using ",a, " engine for output")', bp_writer%type
    endif

adios@adiosVM:~/work/adiosvm/Tutorial/heat2d/fortran$ mpirun  -n 12 simulation/heatSimulation_adios2 heat       4  3   40  50   10  1000 : -n   3 ../cpp/heatAnalysis heat.bp analysis.bp    3  1 
Process decomposition  : 4 x 3
Array size per process : 40 x 50
Number of output steps : 10
Iterations per step    : 1000
Simulation step    0: initialization
Using BPFile          engine for output