updates mass matrix usage; updates Par_files

[danielpeter]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 58.97436% with 64 lines in your changes missing coverage. Please review.
✅ Project coverage is 40.72%. Comparing base (f19a5ee) to head (ea26cf6).
⚠️ Report is 3 commits behind head on devel.

Files with missing lines	Patch %	Lines
..._problem_for_model/input_output/mesh_tools_mod.f90	35.89%	25 Missing ⚠️
src/specfem3D/prepare_timerun.F90	0.00%	14 Missing ⚠️
src/shared/read_parameter_file.F90	50.00%	6 Missing ⚠️
src/tomography/model_update.f90	0.00%	6 Missing ⚠️
src/tomography/save_external_bin_m_up.f90	0.00%	5 Missing ⚠️
src/shared/define_mass_matrices.f90	87.50%	3 Missing ⚠️
src/generate_databases/create_mass_matrices.f90	92.30%	2 Missing ⚠️
src/specfem3D/read_mesh_databases.F90	75.00%	2 Missing ⚠️
src/meshfem3D/check_mesh_quality.f90	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            devel    #1871      +/-   ##
==========================================
- Coverage   40.73%   40.72%   -0.01%     
==========================================
  Files         277      277              
  Lines       66250    66196      -54     
  Branches    10609    10582      -27     
==========================================
- Hits        26986    26958      -28     
+ Misses      39250    39224      -26     
  Partials       14       14              

Flag	Coverage Δ
coverage-testname-	40.72% <58.97%> (-0.01%)	⬇️

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