Upgrade mockito from 3.12.4 to 4.11.0 #1437

Job	Run time
PR Validation	8m 25s
Build with windows on JDK 11	7m 20s
Integration Tests	16m 43s
Bookie Tests	18m 50s
Client Tests	34m 31s
Backward compatibility tests	20m 16s
Build with macos on JDK 11	4m 6s
Replication Tests	24m 20s
Compatibility Check Java8	19m 30s
Compatibility Check Java11	20m 11s
Remaining Tests	17m 44s
Compatibility Check Java17	19m 56s
OWASP Dependency Check	0s
TLS Tests	13m 2s
StreamStorage Tests	19m 1s
Shell tests	27s
	4h 4m 22s

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