DATAJPA-486 - Added support for sliced query execution.

Added support for Slice as return type for query methods. The execution will expand the requested page size by one to read one more element than actually requested. If that additional element is returned, it will considered to be an indicator for whether a next slice is available.

Related issues: DATACMNS-397.
DATAJPA-487 - Adapted to API changes in auditing configuration.