ISPN-3229 L1 cache entries should not be passivated

* Only passivated owned entries
* Added test for L1 entries not being passivated
ISPN-4652 Passivation with shared CacheLoader is not working properly

* ClusteredConditionalCommandTest covers this change
ISPN-4364 Add documentation for Entry Retriever

* Added documentation for retriever
* Also made sure that filter package is public as it should be
Added test for ISPN-4637 that checks whether the HotRodServer returns an error when trying to register a ClientListener which specifies a non-existing converterFactory.
ISPN-4637 Validate remote listener factories being present in server