Cleanups in preparation for Kombu

[knoepfel]

This PR refactors some of the task-manager code to make it more conducive for Kombu's producer/consumer pattern. It also removes some code that we will likely not be using.

[pep8speaks]

Hello @knoepfel! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2021-10-29 17:04:34 UTC

[codecov]

Codecov Report

Merging #549 (8abdbad) into master (1cbc733) will increase coverage by 10.85%.
The diff coverage is 95.65%.

@@             Coverage Diff             @@
##           master     #549       +/-   ##
===========================================
+ Coverage   84.19%   95.04%   +10.85%     
===========================================
  Files          48       45        -3     
  Lines        3093     2743      -350     
  Branches      481      437       -44     
===========================================
+ Hits         2604     2607        +3     
+ Misses        454      103      -351     
+ Partials       35       33        -2     

Flag	Coverage Δ
python-3.10	94.93% <95.65%> (+10.83%)	⬆️
python-3.6	94.65% <95.65%> (+10.74%)	⬆️

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Impacted Files	Coverage Δ
...ecisionengine/framework/taskmanager/TaskManager.py	96.51% <95.38%> (+0.02%)	⬆️
.../decisionengine/framework/engine/DecisionEngine.py	89.26% <100.00%> (ø)
...isionengine/framework/managers/ComponentManager.py	92.68% <100.00%> (ø)
...cisionengine/framework/taskmanager/module_graph.py	100.00% <100.00%> (ø)
src/decisionengine/framework/dataspace/maintain.py	100.00% <0.00%> (+0.95%)	⬆️

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