Fix parallel HDF5 detection (#9982)

Alex

Modules/FindHDF5.cmake

@@ -293,7 +293,7 @@ else()
     # HDF5 was compiled with parallel IO support
     set( HDF5_IS_PARALLEL FALSE )
     foreach( _dir HDF5_INCLUDE_DIRS )
-        if( EXISTS "${_dir}/h5pubconf.h" )
+        if( EXISTS "${_dir}/H5pubconf.h" )
             file( STRINGS "${_dir}/H5pubconf.h" 
                 HDF5_HAVE_PARALLEL_DEFINE
                 REGEX "HAVE_PARALLEL 1" )