DOI-75 Add static astroid version and fix pep8 violations.

[hetmantsev]

Description: Fixing quality tests for ficus-rg branch

1. Updated astroid version fixes error with "ImportError: cannot import name InferenceContext"

Youtrack: DOI-75

Merge deadline: As soon as possible

Reviewers:

• tag reviewer
• tag reviewer

Merge checklist:

• All reviewers approved
• CI build is green
• Commits are squashed

Post merge:

• Delete working branch (if not needed anymore)

Author concerns: List any concerns about this PR - inelegant
solutions, hacks, quick-and-dirty implementations, concerns about
migrations, etc.

[codecov]

Codecov Report

Merging #402 into ficus-rg will decrease coverage by 0.11%.
The diff coverage is 88.88%.

@@             Coverage Diff              @@
##           ficus-rg     #402      +/-   ##
============================================
- Coverage     94.75%   94.64%   -0.12%     
============================================
  Files          1670     1670              
  Lines        157816   157816              
============================================
- Hits         149546   149360     -186     
- Misses         8270     8456     +186

Impacted Files	Coverage Δ
lms/djangoapps/dashboard/sysadmin.py	52.89% <ø> (ø)	⬆️
lms/djangoapps/shoppingcart/models.py	96.24% <ø> (ø)	⬆️
...jangoapps/certificates/tests/test_webview_views.py	99.79% <ø> (ø)	⬆️
...e/management/commands/tests/test_import_library.py	70.27% <ø> (-29.73%)	⬇️
lms/djangoapps/instructor_task/models.py	94.73% <100%> (ø)	⬆️
lms/djangoapps/bulk_email/models.py	68.13% <100%> (-26.38%)	⬇️
...contentstore/management/commands/import-library.py	66.66% <100%> (-25%)	⬇️
lms/djangoapps/instructor/enrollment.py	91.39% <100%> (-4.84%)	⬇️
openedx/core/djangoapps/dark_lang/middleware.py	100% <100%> (ø)	⬆️
pavelib/assets.py	50.56% <75%> (-31.54%)	⬇️
... and 6 more

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[hetmantsev]

start unit tests

[hetmantsev]

start quality tests

[hetmantsev]

start unit tests