hdf5_der

[svn-r27985] Minor fixes to get testflushrefresh.sh to work correctly:

- configure now checks for Perl (removed in the trunk and
  pushed here).

- Removed the svn:executable property from some .in scripts.

- Removed some bash-isms from a few test scripts.

Tested on: Ubuntu 15.04 (Linux 3.19 x86_64) gcc 4.9.2