[DOP-13290] Refact code

[dmitry-pedchenko]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 97.26962% with 16 lines in your changes are missing coverage. Please review.

Project coverage is 94.45%. Comparing base (0394b2e) to head (9fe0b53).

Files	Patch %	Lines
...gration/test_run_transfer/test_hdfs_to_postgres.py	40.00%	6 Missing ⚠️
...gration/test_run_transfer/test_postgres_to_hdfs.py	42.85%	4 Missing ⚠️
tests/mocks.py	96.77%	1 Missing and 1 partial ⚠️
syncmaster/db/repositories/group.py	88.88%	1 Missing ⚠️
syncmaster/db/repositories/run.py	87.50%	1 Missing ⚠️
syncmaster/db/repositories/user.py	83.33%	1 Missing ⚠️
syncmaster/worker/controller.py	92.30%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #14      +/-   ##
===========================================
+ Coverage    90.06%   94.45%   +4.39%     
===========================================
  Files           66      147      +81     
  Lines         2123     5678    +3555     
  Branches       282      534     +252     
===========================================
+ Hits          1912     5363    +3451     
- Misses         163      246      +83     
- Partials        48       69      +21     

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