Improve error handling in scaler (dev)

[cccs-douglass]

No description provided.

[codecov-commenter]

Codecov Report

Merging #268 (12e5251) into dev (224fefb) will increase coverage by 2.50%.
The diff coverage is 4.76%.

@@            Coverage Diff             @@
##              dev     #268      +/-   ##
==========================================
+ Coverage   43.16%   45.66%   +2.50%     
==========================================
  Files          33       33              
  Lines        4701     4969     +268     
==========================================
+ Hits         2029     2269     +240     
- Misses       2672     2700      +28     

Impacted Files	Coverage Δ
...mblyline_core/scaler/controllers/kubernetes_ctl.py	14.06% <4.76%> (+0.88%)	⬆️
assemblyline_core/dispatching/dispatcher.py	78.26% <0.00%> (+1.20%)	⬆️
assemblyline_core/dispatching/client.py	79.87% <0.00%> (+2.01%)	⬆️
assemblyline_core/alerter/processing.py	92.68% <0.00%> (+2.88%)	⬆️

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