DDC-125: Include Query Hints in DQL Query Cache

[doctrinebot]

Jira issue originally created by user @beberlei:

The \Doctrine\ORM\Query has a TODO comment on possible inclusion of the query hints for the DQL Query Parsing Cache.

I have a use case for a custom SQL walker for switching the SELECT part of a query with SELECT count(*) FROM to be able to use Query objects in a paginator. However this would break the query cache since both queries would match the same query cache string.

[doctrinebot]

Comment created by @beberlei:

Fixed, updated ResultCache to use hints also, aswell as fixed a dependency problem in AbstractQuery using getDql() instead of getSql()

[doctrinebot]

Issue was closed with resolution "Fixed"