Tests

parallel tests: do not initialize multiple databases #2271

Job	Run time
GEMs caching	47s
Rubocop and bundle audit	1m 8s
Check the consistency of the database constraints with the application validations	2m 16s
PqQ processors tests	58s
Brakeman	45s
Rspec tests (8, 0)	10m 39s
Rspec tests (8, 1)	18m 12s
Rspec tests (8, 2)	9m 52s
Rspec tests (8, 3)	9m 1s
Rspec tests (8, 4)	11m 28s
Rspec tests (8, 5)	15m 41s
Rspec tests (8, 6)	11m 44s
Rspec tests (8, 7)	11m 49s
Coverage	49s
	1h 45m 9s

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