Clean up QueryMapper and UpdateMapper [DATAMONGO-836]

[spring-projects-issues]

Christoph Strobl opened DATAMONGO-836 and commented

Currently UpdateMapper extends QueryMapper to use some of the functions provided in QueryMapper. Though both mappers do not have that much in common. UpdateMapper does not have to know about keywords like $in or $or as those are specific to Query and are not used in Update.

Split classes and extract a common base to be used in both.

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No further details from DATAMONGO-836

[christophstrobl]

Closing this one as it's an ongoing task that.