Issue title: No itens on database navigator for other schema
 Issue body: I'm using DBeaver with a JDBC connection on Oracle. On database navigator only on my schema itens are visible, when I navigate in another schema all groups, such as table, are empty.

My user has privileges to all schemas, I'm using the very same user in other tools and I can access everything from there.
 Comments: 
 Comment 0: thanks for the bug report
 Comment 1: @RodolfoCCarvalho if it is still reproducible - please check what metadata queries are executed in dbeaver.

You can see them in the Query Manager view (main menu Window->Show View->Query Manager).
You can enable hidden metadata queries in the context menu
 Comment 2: Issue closed - no updates for a long time.
If it is still actual - feel free to reopen the ticket
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