tests

mocha-4 config #2142

Job	Run time
Actions - images prepare	1m 43s
Actions - artifacts prepare	6m 43s
Actions - unit tests coverage	5m 51s
Actions - clippy	56s
Actions - integration tests lint	18s
Actions - rustfmt	10s
Actions - unit test	1m 25s
test:core Integration Tests	20m 2s
test:distribution Integration Tests	1m 35s
test:auto-withdrawer Integration Tests	16m 54s
test:core:slashing Integration Tests	20m 25s
test:gv Integration Tests	1m 51s
test:initia Integration Tests	9m 29s
test:mirror Integration Tests	6m 26s
test:pump Integration Tests	3m 48s
test:pump-multi Integration Tests	7m 25s
test:splitter Integration Tests	1m 47s
test:validator-set Integration Tests	1m 27s
test:validators-stats Integration Tests	3m 21s
	1h 51m 36s

Provide feedback