`logging.exception()` already adds the the exception information after
the supplied message.
Also: the `message` attribute of `Exception` class has been dropped in
Python 3, always use `str(e)`.
xref. https://github.com/galaxyproject/galaxy/issues/1715
and starting Galaxy with `APP_WEBSERVER=gunicorn sh run.sh`.
Additional gunicorn cmdline arguments can be passed using
`GUNICORN_CMD_ARGS`. In a first pass this will allow
running planemo {server, test} under python 3, as Paste
has some problems under python 3:
```
galaxy.web.stack INFO 2018-09-29 22:16:00,216 Galaxy server instance 'main' is running
Traceback (most recent call last):
File "./scripts/paster.py", line 27, in <module>
serve.run()
File "/tmp/tmpv5tow6c8/galaxy-dev/lib/galaxy/util/pastescript/serve.py", line 1055, in run
invoke(command, command_name, options, args[1:])
File "/tmp/tmpv5tow6c8/galaxy-dev/lib/galaxy/util/pastescript/serve.py", line 1061, in invoke
exit_code = runner.run(args)
File "/tmp/tmpv5tow6c8/galaxy-dev/lib/galaxy/util/pastescript/serve.py", line 226, in run
result = self.command()
File "/tmp/tmpv5tow6c8/galaxy-dev/lib/galaxy/util/pastescript/serve.py", line 676, in command
serve()
File "/tmp/tmpv5tow6c8/galaxy-dev/lib/galaxy/util/pastescript/serve.py", line 653, in serve
server(app)
File "/tmp/tmpv5tow6c8/galaxy-dev/lib/galaxy/util/pastescript/loadwsgi.py", line 232, in server_wrapper
**context.local_conf)
File "/tmp/tmpv5tow6c8/galaxy-dev/lib/galaxy/util/pastescript/loadwsgi.py", line 90, in fix_call
val = callable(*args, **kw)
File "/home/travis/.planemo/gx_venv_3_release_18.09/lib/python3.6/site-packages/paste/httpserver.py", line 1353, in server_runner
for name, value in kwargs.items():
RuntimeError: dictionary changed size during iteration
```
That said gunicorn is a nice pure-python alternative to paste going
forward.
We don't rely on TwillTestCase anymore, that is now exclusively used by
ShedTwillTestCase. Then I've just re-used the infrastructure of
ToolsTestCase for discovering tests, while making sure that we do use an
admin API key during testing.
Nicola Soranzo