DATAJPA-501 - Adapted auditing configuration to latest changes in Spring Data Commons.

The configuration subsystem now sets up an AuditingHandler with a direct reference to a MappingContext. We now also wire an ObjectFactory into the AuditingEntityListener instead of the AuditingHandler directly.

This also lets us get rid off the need to mark AuditorAware instances as lazy initialized as the initialization chain is interrupted right at the AuditingEntityListener.

Related issues: DATACMNS-365.