[VIRTS-2743] Abilities v2 API tests

[bleepbop]

Description

Unit Tests for Abilities V2 API. DELETE endpoint is currently untested, due to underlying aiohttp issue.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Verified that tests work for various python versions using tox.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

[codecov]

Codecov Report

Merging #2228 (8f75bd7) into master (33d9085) will increase coverage by 1.62%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2228      +/-   ##
==========================================
+ Coverage   67.04%   68.67%   +1.62%     
==========================================
  Files          92       94       +2     
  Lines        7286     7409     +123     
==========================================
+ Hits         4885     5088     +203     
+ Misses       2401     2321      -80     

Impacted Files	Coverage Δ
app/service/rest_svc.py	45.81% <0.00%> (-0.24%)	⬇️
app/api/v2/handlers/ability_api.py	96.22% <0.00%> (ø)
app/api/v2/managers/ability_api_manager.py	90.00% <0.00%> (ø)
app/objects/c_ability.py	94.26% <0.00%> (+0.81%)	⬆️
app/service/file_svc.py	63.84% <0.00%> (+1.87%)	⬆️
app/api/v2/managers/base_api_manager.py	78.94% <0.00%> (+9.64%)	⬆️
app/service/data_svc.py	41.47% <0.00%> (+9.69%)	⬆️
app/api/v2/handlers/base_object_api.py	73.00% <0.00%> (+45.00%)	⬆️

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[uruwhy]

Couple tweaks and changes - great first pass!

[uruwhy]

LGTM

[mchan143]

LGTM