* gnu/packages/python-xyz.scm (python-robotframework): Update to 5.0.
[patches]: Remove python-robotframework-ug2html.patch. Add
python-robotframework-atest.patch and update
python-robotframework-source-date-epoch.patch.
[phases]: Use gexps.
{delete-problematic-tests}: New phase.
{check}: Also run `atest', the acceptance test suite.
[native-inputs]: Use new style. Add python-lxml, python-pyyaml,
python-xmlschema, scrot and xvfb-run.
* gnu/packages/patches/python-robotframework-atest.patch: New file.
* gnu/packages/patches/python-robotframework-source-date-epoch.patch: Update patch.
* gnu/packages/patches/python-robotframework-ug2html.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
