Exclude CVE-2020-15250 junit vulnerability

[chris-j-h]

In junit 4.13.1 (currently used) & java 1.7+ (currently java 11+) this vulnerability is fixed.

https://ossindex.sonatype.org/vuln/7ea56ad4-8a8b-4e51-8ed9-5aad83d8efb1?component-type=maven&component-name=junit.junit&utm_source=ossindex-client&utm_medium=integration&utm_content=1.1.1

[codecov-io]

Codecov Report

Merging #1184 (cc85ec3) into master (7e3ce82) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1184   +/-   ##
=========================================
  Coverage     99.46%   99.46%           
  Complexity     2926     2926           
=========================================
  Files           446      446           
  Lines          8429     8429           
  Branches        453      453           
=========================================
  Hits           8384     8384           
  Misses            5        5           
  Partials         40       40           

Flag	Coverage Δ	Complexity Δ
unittests	99.46% <ø> (ø)	0.00 <ø> (ø)

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