feat, add AF_ratio to Vardict filters

[hassanfa]

This PR:

Added:

• AF_ratio to Vardict filter as a filter for removing possible germline mutations fixes Germline variant uploaded to Scout for paired analysis #435

Review and tests:

• Tests pass
• Code review
• New code is executed and covered by tests, and test approve

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
0 Code Smells

No Coverage information
0.0% Duplication

[coveralls]

Pull Request Test Coverage Report for Build 2633

• 2 of 2 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.0009%) to 98.881%

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Totals
Change from base Build 2620:	0.0009%
Covered Lines:	1237
Relevant Lines:	1251

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💛 - Coveralls

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov]

Codecov Report

Merging #441 (0369218) into develop (e178fea) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #441   +/-   ##
========================================
  Coverage    99.09%   99.09%           
========================================
  Files           24       24           
  Lines         1543     1543           
========================================
  Hits          1529     1529           
  Misses          14       14           

Flag	Coverage Δ
unittests	99.09% <0.00%> (ø)

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[hassanfa]

no need for this anymore.