planemo test ignores tests for tools with to recent version

We see an exception in the output, but the test is not showing up in the test output:

```
Traceback (most recent call last):
File "/tmp/tmp4o1tthh_/galaxy-dev/lib/galaxy/tools/toolbox/base.py", line 662, in _load_tool_tag_set
tool = self.load_tool(concrete_path, use_cached=False, tool_cache_data_dir=tool_cache_data_dir)
File "/tmp/tmp4o1tthh_/galaxy-dev/lib/galaxy/tools/toolbox/base.py", line 858, in load_tool
tool = self.create_tool(config_file=config_file, tool_shed_repository=tool_shed_repository, guid=guid, tool_cache_data_dir=tool_cache_data_dir, **kwds)
File "/tmp/tmp4o1tthh_/galaxy-dev/lib/galaxy/tools/__init__.py", line 330, in create_tool
tool = self._create_tool_from_source(tool_source, config_file=config_file, **kwds)
File "/tmp/tmp4o1tthh_/galaxy-dev/lib/galaxy/tools/__init__.py", line 349, in _create_tool_from_source
return create_tool_from_source(self.app, tool_source, **kwds)
File "/tmp/tmp4o1tthh_/galaxy-dev/lib/galaxy/tools/__init__.py", line 244, in create_tool_from_source
tool = ToolClass(config_file, tool_source, app, **kwds)
File "/tmp/tmp4o1tthh_/galaxy-dev/lib/galaxy/tools/__init__.py", line 554, in __init__
raise e
File "/tmp/tmp4o1tthh_/galaxy-dev/lib/galaxy/tools/__init__.py", line 551, in __init__
self.parse(tool_source, guid=guid, dynamic=dynamic)
File "/tmp/tmp4o1tthh_/galaxy-dev/lib/galaxy/tools/__init__.py", line 781, in parse
raise Exception(message)
Exception: The tool trimns targets version 21.01 of Galaxy, you should upgrade Galaxy to ensure proper functioning of this tool.
```

related https://github.com/galaxyproject/planemo/issues/679