Refactor documents upload. Add bid proposal document. Refactor clients. Make single client for cdb. Improve client time sync. #287

Job	Run time
flake8	9s
black	11s
pytest-fast (above_threshold)	24s
pytest-fast (above_threshold_features)	29s
pytest-fast (above_threshold_lcc)	35s
pytest-fast (above_threshold_eu)	32s
pytest-fast (above_threshold_eu_features)	39s
pytest-fast (above_threshold_eu_lcc)	1m 4s
pytest-fast (above_threshold_ua)	27s
pytest-fast (above_threshold_ua_features)	30s
pytest-fast (above_threshold_ua_lcc)	24s
pytest-fast (below_threshold)	18s
pytest-fast (below_threshold_central)	20s
pytest-fast (below_threshold_features)	25s
pytest-fast (close_framework_agreement_ua)	38s
pytest-fast (close_framework_agreement_ua_central)	41s
pytest-fast (competitive_dialogue_eu)	35s
pytest-fast (competitive_dialogue_ua)	32s
pytest-fast (competitive_dialogue_ua_features)	29s
pytest-fast (esco)	5m 31s
pytest-fast (esco_features)	49s
pytest-fast (negotiation)	1m 51s
pytest-fast (negotiation_quick)	1m 10s
pytest-fast (reporting)	25s
pytest-fast (simple_defense)	24s
	19m 32s

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