Test common refactoring

[VakarisZ]

What does this PR do?

Further improves the UT's infrastructure by:
Moved fixtures left in production code to the relevant test folder
Moved profiler to tests
Moved unit tests under a separate folder to distinguish them from infrastructure

PR Checklist

• Have you added an explanation of what your changes do and why you'd like to include them?
• Is the TravisCI build passing?
• Was the CHANGELOG.md updated to reflect the changes?
• Was the documentation framework updated to reflect the changes?

Testing Checklist

• Have you successfully tested your changes locally? Elaborate:

  Tested by running all of the unit tests (all pass, one gets skipped for not running on Windows)

[codecov]

Codecov Report

Merging #1178 (e978823) into develop (832453f) will increase coverage by 0.10%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #1178      +/-   ##
===========================================
+ Coverage    28.80%   28.91%   +0.10%     
===========================================
  Files          417      418       +1     
  Lines        12762    12780      +18     
===========================================
+ Hits          3676     3695      +19     
+ Misses        9086     9085       -1     

Impacted Files	Coverage Δ
.../unit_tests/infection_monkey/telemetry/conftest.py	100.00% <ø> (ø)
...nit_tests/monkey_island/cc/environment/conftest.py	100.00% <ø> (ø)
monkey/tests/unit_tests/monkey_island/conftest.py	100.00% <ø> (ø)
...nkey/tests/unit_tests/monkey_island/cc/conftest.py	100.00% <100.00%> (ø)
.../unit_tests/monkey_island/cc/mongomock_fixtures.py	100.00% <100.00%> (ø)
monkey/__init__.py	100.00% <0.00%> (+100.00%)	⬆️

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