Removing ADIOS2 deprecated debug mode flag

ADIOS2 2.9 has completely removed the debug mode flag parameter from
the macro adios2_init() in the C API (deprecated/ignored in 2.8):
[2.8] #define adios2_init(comm, debug_mode) adios2_init_mpi(comm)
[2.9] #define adios2_init(comm) adios2_init_mpi(comm)

Also, 'DebugON' is no longer a member of 'adios2' in 2.9. Any usage
of adios2::DebugON will cause build errors.

This fix is required for SCORPIO to build with ADIOS2 2.9 or higher
versions (it still supports ADIOS2 2.8).

Author: dqwu

src/clib/pioc.c

@@ -1305,7 +1305,7 @@ int PIOc_Init_Intracomm(MPI_Comm comp_comm, int num_iotasks, int stride, int bas
 
     if (ios->adios_io_process == 1)
     {
-        ios->adiosH = adios2_init(ios->adios_comm, adios2_debug_mode_on);
+        ios->adiosH = adios2_init_mpi(ios->adios_comm);
         if (ios->adiosH == NULL)
         {
             GPTLstop("PIO:PIOc_Init_Intracomm");

tools/adios2pio-nm/adios2pio-nm-lib.cxx

@@ -2144,7 +2144,7 @@ int ConvertBPFile(const string &infilepath, const string &outfilename,
     nproc   = w_nproc;
 
     // Initialization of the class factory
-    adios2::ADIOS adios(w_comm, adios2::DebugON);
+    adios2::ADIOS adios(w_comm);
 
     double time_init = 0;
     double time_init_max = -1;
@@ -2230,7 +2230,7 @@ int ConvertBPFile(const string &infilepath, const string &outfilename,
         adios.RemoveIO(bpIO[0].Name());
         bpReader[1].Close();
         adios.RemoveIO(bpIO[1].Name());
-        adios2::ADIOS adios_new(comm, adios2::DebugON);
+        adios2::ADIOS adios_new(comm);
         ierr = OpenAdiosFile(adios_new, bpIO, bpReader, file0, err_msg);
 
         if (io_proc == 0)