Add test for solution type group

[sarahd93]

Checklist:

• Tests
• CHANGELOG Entry

[codecov]

Codecov Report

Merging #1402 into gsa-8.0 will increase coverage by 0.08%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           gsa-8.0    #1402      +/-   ##
===========================================
+ Coverage    36.38%   36.47%   +0.08%     
===========================================
  Files          960      960              
  Lines        21664    21664              
  Branches      6025     6003      -22     
===========================================
+ Hits          7883     7901      +18     
+ Misses       12449    12433      -16     
+ Partials      1332     1330       -2

Impacted Files	Coverage Δ
gsa/src/web/components/icon/solutiontypeicon.js	96.87% <0%> (+12.5%)	⬆️
...rc/web/components/powerfilter/solutiontypegroup.js	93.75% <0%> (+87.5%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 64f163e...782aaa5. Read the comment docs.