Time Section in the mdu has unknown keywords + Structure file has unkown keywords

[sumihar]

Describe the bug
The following validation errors happen with test case e02_f002_c100_longculvert:

(.hydrolib) PS C:\Software\delft3d\test\deltares_testbench\data\cases\e02_f002_c100_longculvert> python.exe C:\Software\HYDROLIB-core\hydrolib\tools\ext_old_to_new\cli.py --mdufile tunnel.mdu
Traceback (most recent call last):
File "C:\Software\HYDROLIB-core\hydrolib\core\basemodel.py", line 71, in init
super().init(**data)
File "C:\Users\sumihar\virtualenvs.hydrolib\Lib\site-packages\pydantic\v1\main.py", line 341, in init
raise validation_error
pydantic.v1.error_wrappers.ValidationError: 3 validation errors for LegacyFMModel
numerics -> zlayercenterbedvel
value could not be parsed to a boolean (type=type_error.bool)
wind -> root
Unknown keywords are detected in section: 'Wind', '['stericcorrection']' (type=value_error)
processes -> root
Unknown keywords are detected in section: 'Processes', '['dtmassbalance']' (type=value_error)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Software\HYDROLIB-core\hydrolib\tools\ext_old_to_new\main_converter.py", line 409, in from_mdu
fm_model = LegacyFMModel(mdu_file, recurse=False)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Software\HYDROLIB-core\hydrolib\core\basemodel.py", line 931, in init
super().init(*args, **kwargs)
File "C:\Software\HYDROLIB-core\hydrolib\core\basemodel.py", line 91, in init
raise ValidationError([ErrorWrapper(e, loc=identifier)], self.class)
pydantic.v1.error_wrappers.ValidationError: 3 validation errors for LegacyFMModel
tunnel.mdu -> numerics -> zlayercenterbedvel
value could not be parsed to a boolean (type=type_error.bool)
tunnel.mdu -> wind -> root
Unknown keywords are detected in section: 'Wind', '['stericcorrection']' (type=value_error)
tunnel.mdu -> processes -> root
Unknown keywords are detected in section: 'Processes', '['dtmassbalance']' (type=value_error)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Software\HYDROLIB-core\hydrolib\tools\ext_old_to_new\cli.py", line 126, in
main()
File "C:\Software\HYDROLIB-core\hydrolib\tools\ext_old_to_new\cli.py", line 96, in main
converter = ExternalForcingConverter.from_mdu(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Software\HYDROLIB-core\hydrolib\tools\ext_old_to_new\main_converter.py", line 422, in from_mdu
data, mdu_info = ExternalForcingConverter.get_mdu_info(mdu_file)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Software\HYDROLIB-core\hydrolib\tools\ext_old_to_new\main_converter.py", line 360, in get_mdu_info
mdu_time = Time(**time_data)
^^^^^^^^^^^^^^^^^
File "C:\Software\HYDROLIB-core\hydrolib\core\basemodel.py", line 88, in init
raise e
File "C:\Software\HYDROLIB-core\hydrolib\core\basemodel.py", line 71, in init
super().init(**data)
File "C:\Users\sumihar\virtualenvs.hydrolib\Lib\site-packages\pydantic\v1\main.py", line 341, in init
raise validation_error
pydantic.v1.error_wrappers.ValidationError: 1 validation error for Time
root
Unknown keywords are detected in section: 'Time', '['timestepanalysis']' (type=value_error)

To Reproduce
Steps to reproduce the behavior:

1. Go to 'C:\Software\delft3d\test\deltares_testbench\data\cases\e02_f002_c100_longculvert'
2. Run '(.hydrolib) PS C:\Software\delft3d\test\deltares_testbench\data\cases\e02_f002_c100_longculvert> python.exe C:\Software\HYDROLIB-core\hydrolib\tools\ext_old_to_new\cli.py --mdufile tunnel.mdu'
3. See error

Expected behavior
If those are obsolete parameters, please remove them. Otherwise, if they are not relevant for the extforce, we need to discuss further what to do.

Screenshots
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Version info (please complete the following information):

• OS: Windows
• Version [e.g. 0.1.5]

Additional context
Add any other context about the problem here.

[sumihar]

Please note that this issue happens too in the following test cases:
e02_f002_c101_longculvert_timeseries_valve
e02_f002_c102_longculvert_new\