upgrade to mockito version compatible with java 11

[INFO] Running org.apache.jackrabbit.oak.security.authentication.ldap.impl.PoolableUnboundConnectionFactoryTest
[ERROR] Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.539 s <<< FAILURE! - in org.apache.jackrabbit.oak.security.authentication.ldap.impl.PoolableUnboundConnectionFactoryTest
[ERROR] testSetValidator(org.apache.jackrabbit.oak.security.authentication.ldap.impl.PoolableUnboundConnectionFactoryTest)  Time elapsed: 0.539 s  <<< ERROR!
org.mockito.exceptions.base.MockitoException:

Mockito cannot mock this class: interface org.apache.directory.ldap.client.api.LdapConnectionValidator.

Mockito can only mock non-private & non-final classes.
If you're not sure why you're getting this error, please report to the mailing list.


Java               : 11
JVM vendor name    : Oracle Corporation
JVM vendor version : 11-ea+22
JVM name           : Java HotSpot(TM) 64-Bit Server VM
JVM version        : 11-ea+22
JVM info           : mixed mode
OS name            : Windows 10
OS version         : 10.0