Upgrade mockito from 3.12.4 to 4.11.0 #1442

Job	Run time
PR Validation	8m 20s
Integration Tests	20m 51s
Build with macos on JDK 11	3m 45s
Backward compatibility tests	24m 54s
Compatibility Check Java8	19m 55s
Bookie Tests	18m 39s
Compatibility Check Java11	20m 28s
OWASP Dependency Check	0s
Build with windows on JDK 11	9m 7s
Client Tests	34m 47s
Compatibility Check Java17	19m 30s
Replication Tests	23m 22s
Remaining Tests	18m 20s
TLS Tests	13m 1s
StreamStorage Tests	19m 8s
Shell tests	27s
	4h 14m 34s

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