Fixing extension bundle and test utils

[vrdmr]

Description

Fixes #

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PR information

• The title of the PR is clear and informative.
• There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• If applicable, the PR references the bug/issue that it fixes in the description.
• New Unit tests were added for the changes made and CI is passing.

Quality of Code and Contribution Guidelines

• I have read the contribution guidelines.

[codecov]

Codecov Report

Merging #1115 (280df16) into dev (7730062) will increase coverage by 1.26%.
The diff coverage is 92.85%.

❗ Current head 280df16 differs from pull request most recent head 992749d. Consider uploading reports for the commit 992749d to get more accurate results

@@            Coverage Diff             @@
##              dev    #1115      +/-   ##
==========================================
+ Coverage   83.88%   85.14%   +1.26%     
==========================================
  Files          34       33       -1     
  Lines        1868     1845      -23     
  Branches      300      273      -27     
==========================================
+ Hits         1567     1571       +4     
+ Misses        235      205      -30     
- Partials       66       69       +3     

Flag	Coverage Δ
unittests	85.14% <92.85%> (+1.26%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
azure_functions_worker/dispatcher.py	89.21% <80.00%> (+0.08%)	⬆️
azure_functions_worker/constants.py	100.00% <100.00%> (ø)
azure_functions_worker/loader.py	85.05% <100.00%> (+0.53%)	⬆️
azure_functions_worker/utils/wrappers.py	100.00% <100.00%> (ø)
azure_functions_worker/utils/dependency.py	86.46% <0.00%> (-3.76%)	⬇️
azure_functions_worker/main.py

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