Don't explode on incorrect user_id in test.
Set current user before creating post.

When creating post with tag.
Clear out most of deprecations in tag controller.
Fix test for report controller.
Fix query for counting.
Remove test for long-removed pool slave/master system.
Fix up deprecated queries.
Fix test for Note model.
Fix test for PostTagHistory (which seems useless).
Fix test for PostController.

Refactor while at it.