Make AuditorBookieTest#waitForNewAuditor stronger. #1080

Job	Run time
PR Validation	10m 43s
Backward compatibility tests	5m 44s
Integration Tests	11m 18s
Bookie Tests	20m 58s
Client Tests	41m 23s
Build with windows on JDK 11	9m 14s
Replication Tests	16m 19s
Remaining Tests	20m 27s
Compatibility Check Java8	21m 29s
TLS Tests	15m 29s
Build with macos on JDK 11	5m 30s
Compatibility Check Java11	22m 30s
StreamStorage Tests	23m 26s
Compatibility Check Java17	22m 6s
Shell tests	50s
OWASP Dependency Check	0s
	4h 7m 26s

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