Fix operating_temperature default init values across sensor classes

[vapsik]

Issue

Docstring states that the sensor default operating_temperature which is in unit K is assumed to be 25 C = 25+273.15 = 298.15 K. The initialization value, however, was set to 25 across sensor classes and never converted from C to K creating a contradiction.

Summary

Set operating_temperature default init values from operating_temperature=25 to operating_temperature=298.15 across Sensor classes sensor.py, gyroscope.py, barometer.py, and accelerometer.py.

[Gui-FernandesBR]

we never merge against master, the heading branch should be the develop branch

[Gui-FernandesBR]

LGTM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.51%. Comparing base (e0ff281) to head (1b49515).
⚠️ Report is 41 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1118      +/-   ##
===========================================
+ Coverage    82.18%   82.51%   +0.33%     
===========================================
  Files          122      128       +6     
  Lines        16355    16617     +262     
===========================================
+ Hits         13441    13712     +271     
+ Misses        2914     2905       -9     

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