bump default module memory value
I noticed in testing HDF5 in particular that Darshan's default memory allocations do not leave enough space for HDF5 module data. We should bump up the 4MB per process default to avoid that for now.
I noticed in testing HDF5 in particular that Darshan's default memory allocations do not leave enough space for HDF5 module data. We should bump up the 4MB per process default to avoid that for now.