updates azure tests; updates Mesh_Par_file reading (optional parameters); updates rhostore storage & usage

[danielpeter]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 83.69565% with 15 lines in your changes missing coverage. Please review.

Project coverage is 48.87%. Comparing base (c172806) to head (efb8ea7).
Report is 5 commits behind head on devel.

Files with missing lines	Patch %	Lines
src/meshfem3D/read_value_mesh_parameters.f90	76.00%	6 Missing ⚠️
src/specfem3D/compute_boundary_kernel.f90	0.00%	4 Missing ⚠️
src/generate_databases/model_vs30.f90	0.00%	1 Missing ⚠️
src/generate_databases/setup_color_perm.f90	0.00%	1 Missing ⚠️
src/specfem3D/gravity_perturbation.f90	0.00%	1 Missing ⚠️
src/tomography/model_update.f90	0.00%	1 Missing ⚠️
src/tomography/save_external_bin_m_up.f90	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            devel    #1815      +/-   ##
==========================================
+ Coverage   48.82%   48.87%   +0.04%     
==========================================
  Files         273      273              
  Lines       64648    64716      +68     
==========================================
+ Hits        31567    31629      +62     
- Misses      33081    33087       +6     

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