YACHT-971: moved some classes to commons package

[marcin-kolda]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 407

• 64 of 79 (81.01%) changed or added relevant lines in 41 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 81.208%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/datastore_export/export_datastore_to_big_query_handler.py	0	1	0.0%
src/retention/retention-routing.py	0	1	0.0%
src/commons/config/appinfo.py	0	1	0.0%
src/datastore_export/export_datastore_backups_to_gcs_service.py	0	1	0.0%
src/backup/dataset_backup_handler.py	0	2	0.0%
src/slo/main.py	0	2	0.0%
src/restore/restore_ui_handler.py	0	2	0.0%
src/backup/organization_backup_handler.py	0	2	0.0%
src/datastore_export/load_datastore_backups_to_big_query_service.py	0	3	0.0%

Totals
Change from base Build 405:	0.03%
Covered Lines:	2165
Relevant Lines:	2666

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💛 - Coveralls