Split load_and_verify_mti function

[karanphil]

Quick description

New little PR! First, I changed the name of the function io.mti.verifications_and_loading_mti to io.mti.load_and_verify_mti. Then, I simply added two new local functions _parse_acquisition_parameters and _prepare_B1_map, making the big function less big.

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Type of change

Check the relevant options.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Provide data, screenshots, command line to test (if relevant)

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Checklist

• My code follows the style guidelines of this project (run autopep8)
• I added relevant citations to scripts, modules and functions docstrings and descriptions
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I moved all functions from the script file (except the argparser and main) to scilpy modules
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[codecov]

Codecov Report

Attention: Patch coverage is 72.22222% with 10 lines in your changes are missing coverage. Please review.

Project coverage is 69.50%. Comparing base (4491228) to head (b981950).
Report is 15 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #933      +/-   ##
==========================================
+ Coverage   69.46%   69.50%   +0.04%     
==========================================
  Files         390      392       +2     
  Lines       20944    20972      +28     
  Branches     3205     3207       +2     
==========================================
+ Hits        14548    14576      +28     
  Misses       5093     5093              
  Partials     1303     1303              

Components	Coverage Δ
Scripts	71.93% <100.00%> (+0.01%)	⬆️
Library	65.51% <70.58%> (+0.09%)	⬆️