Bugfix: docker_pull

[domwhewell-sage]

This PR changes the log message types that are sent, also the response code is returned in a debug message if the manifest or tags are failed to be returned. #1780

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 93%. Comparing base (9cb8981) to head (0880d48).
Report is 3 commits behind head on dev.

Files with missing lines	Patch %	Lines
bbot/modules/docker_pull.py	0%	6 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##             dev   #1788   +/-   ##
=====================================
- Coverage     93%     93%   -0%     
=====================================
  Files        346     346           
  Lines      26674   26674           
=====================================
- Hits       24587   24567   -20     
- Misses      2087    2107   +20     

Flag	Coverage Δ
	93% <0%> (-<1%)	⬇️

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