EntryRepository: refactor getBuilderByUser

We refactor getBuilderByUser to separate QueryBuilder getter and the
orderBy(). The previous code of getBuilderByUser() has been moved to
getSortedQueryBuilderByUser(). getBuildByUser() now returns a
QueryBuilder without the call to orderBy().

A new method named sortQueryBuilder() returns a given QueryBuilder with
an orderBy() call using given sort parameters.

Signed-off-by: Kevin Decherf <kevin@kdecherf.com>