US47036 Apply proxy settings

[mykhaliev1]

Each PR must conform to Developer's Guide.

Quick checklist:

• Description of PR explains the context of change
• Unit tests cover the change, no broken tests
• No static analysis warnings (Codacy etc.)
• Documentation update ('available in the unstable snapshot' warning if necessary)
• Changes file inside site/dat/docs/changes directory, one-line note of change inside

[codecov]

Codecov Report

Merging #1700 (ee76d0e) into master (77cf26c) will increase coverage by 0.01%.
The diff coverage is 66.67%.

@@            Coverage Diff             @@
##           master    #1700      +/-   ##
==========================================
+ Coverage   90.33%   90.34%   +0.01%     
==========================================
  Files          68       68              
  Lines       18161    18197      +36     
==========================================
+ Hits        16404    16438      +34     
- Misses       1757     1759       +2     

Impacted Files	Coverage Δ
bzt/utils.py	86.02% <66.67%> (-0.45%)	⬇️
bzt/modules/javascript.py	92.35% <0.00%> (+4.26%)	⬆️

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