Update h5LT files with latest flex and Bison available on jelly (#502)

* Modify temporary rpath for testing in java example scripts.

* Update URL in source file Copyright headers for web copy of COPYING (license) file.

* Add release_docs/code-conventions.md file.

* Add script to test h5py.

* Fix script error.

* Add file h5pytest.yml.

* Test declaration of counter variables in for loops.

* Committing clang-format changes

* Committing clang-format changes

* Added [] to line 126 of H5LTanalyze.l.
Ran bin/genparser with flex v2.6.4 and Bison v3.0.4 on jelly.

* Revert "Added [] to line 126 of H5LTanalyze.l."

This reverts commit e4a9cee.

* Revert extra commits to match canonical develop.

* Added [] to H5LTanalyze.l line 126 to eliminate warning "rule could not be
matched".
Ran bin/genparser hl/src with flex v2.6.4 and Bison v3.0.4 on jelly.

* Added HD to strdup in H5LTparse.y line 338.
Ran bin/genparser hlsrc again.

* Removed line 126 from H5LTanalyze.l - previous line matches.
Added previously removed line 318 of H5LTparse.y to fix hl_test_lite
failure.
Ran bin/genparser.

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