Fixing E2E and UT flaky tests.

[pdthummar]

Description

Running tests parallelly and increasing the verbosity of output

Fixes #1191

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 #1188 (95c11b6) into dev (dd88338) will decrease coverage by 51.99%.
The diff coverage is n/a.

❗ Current head 95c11b6 differs from pull request most recent head 273630e. Consider uploading reports for the commit 273630e to get more accurate results

@@             Coverage Diff             @@
##              dev    #1188       +/-   ##
===========================================
- Coverage   83.90%   31.92%   -51.99%     
===========================================
  Files          34       34               
  Lines        1889     1889               
  Branches      363      363               
===========================================
- Hits         1585      603      -982     
- Misses        233     1285     +1052     
+ Partials       71        1       -70     

Flag	Coverage Δ
unittests	31.92% <ø> (-51.94%)	⬇️

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

Impacted Files	Coverage Δ
...e_functions_worker/bindings/nullable_converters.py	21.62% <0.00%> (-78.38%)	⬇️
azure_functions_worker/functions.py	25.00% <0.00%> (-71.28%)	⬇️
azure_functions_worker/dispatcher.py	19.74% <0.00%> (-69.24%)	⬇️
azure_functions_worker/utils/tracing.py	31.81% <0.00%> (-68.19%)	⬇️
azure_functions_worker/utils/common.py	33.33% <0.00%> (-66.67%)	⬇️
.../shared_memory_data_transfer/file_accessor_unix.py	19.60% <0.00%> (-57.85%)	⬇️
azure_functions_worker/bindings/meta.py	25.30% <0.00%> (-57.84%)	⬇️
...s/shared_memory_data_transfer/shared_memory_map.py	28.57% <0.00%> (-55.36%)	⬇️
azure_functions_worker/extension.py	44.95% <0.00%> (-54.13%)	⬇️
azure_functions_worker/utils/dependency.py	33.08% <0.00%> (-53.39%)	⬇️
... and 14 more

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