#1660 Fix HDF5 acceptance test issue: ...Node200 is matched scientific notation 'e200'

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@18380 b5f69653-2bf5-0310-8201-b0dafb8e1405
#1660 Fix weekly acceptance test broken by addition of postprocessing the HDF5 in r18376

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@18381 b5f69653-2bf5-0310-8201-b0dafb8e1405