[SwimmingDem] Chien Drag Test Analysis Failing in Nightly

[roigcarlo]

Description
@jgonzalezusua Seems that chien_drag_test_analysis.py is causing the nightly build to fail. Could you take a look?
Pinging you because we have no one assigned to Swimming dem and the test was last touched by you 3 months ago.

Sample of the failing report: https://github.com/KratosMultiphysics/Kratos/actions/runs/7447864857/job/20261002872?pr=11930

Traceback (most recent call last):
  File "/__w/Kratos/Kratos/bin/Release/applications/SwimmingDEMApplication/tests/DragTestFactory.py", line 26, in test_execution
    self.test.Run()
  File "/__w/Kratos/Kratos/bin/Release/KratosMultiphysics/SwimmingDEMApplication/swimming_DEM_analysis.py", line 205, in Run
    super().Run()
  File "/__w/Kratos/Kratos/bin/Release/KratosMultiphysics/analysis_stage.py", line 50, in Run
    self.Finalize()
  File "/__w/Kratos/Kratos/bin/Release/applications/SwimmingDEMApplication/tests/drag_tests/chien_law/chien_drag_test_analysis.py", line 34, in Finalize
    self.CheckValues(x_vel)
UnboundLocalError: local variable 'x_vel' referenced before assignment

[rubenzorrilla]

@KratosMultiphysics/dem @jgonzalezusua is this still active?

[jgonzalezusua]

Sorry for the late response, I have not check it. It should work since it is in master branch. Anyway, it is better to deactivate this test temporary. It seems is something related with the mesh and not with the calculation.