Fix weather station autodetect

[wtgee]

When the weather sensor was introduced it used the term port instead of the serial_port that was found in the config. This led to some inconsistencies and bugs, so this PR cleans those up.

Tested on PAN026

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 70.21%. Comparing base (6bdacc8) to head (3c04b16).

❗ Current head 3c04b16 differs from pull request most recent head 2ee1ffa. Consider uploading reports for the commit 2ee1ffa to get more accurate results

Files	Patch %	Lines
src/panoptes/pocs/sensor/weather.py	0.00%	3 Missing ⚠️
src/panoptes/pocs/utils/service/weather.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1254      +/-   ##
===========================================
- Coverage    70.22%   70.21%   -0.02%     
===========================================
  Files          100      100              
  Lines         8399     8399              
  Branches      1164     1164              
===========================================
- Hits          5898     5897       -1     
  Misses        2352     2352              
- Partials       149      150       +1     

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