FIX: setting owner on topic should not bump topic

app/models/post.rb

@@ -439,7 +439,7 @@ class Post < ActiveRecord::Base
       new_user: new_user.username_lower
     )
 
-    revise(actor, { raw: self.raw, user_id: new_user.id, edit_reason: edit_reason })
+    revise(actor, {raw: self.raw, user_id: new_user.id, edit_reason: edit_reason}, bypass_bump: true)
 
     if post_number == topic.highest_post_number
       topic.update_columns(last_post_user_id: new_user.id)

spec/services/post_owner_changer_spec.rb

@@ -20,9 +20,12 @@ describe PostOwnerChanger do
     end
 
     it "changes the user" do
+      bumped_at = topic.bumped_at
+
       old_user = p1.user
       PostOwnerChanger.new(post_ids: [p1.id], topic_id: topic.id, new_owner: user_a, acting_user: editor).change_owner!
       p1.reload
+      expect(p1.topic.bumped_at).to eq(bumped_at)
       expect(p1.topic.last_post_user_id).to eq(user_a.id)
       expect(old_user).not_to eq(p1.user)
       expect(p1.user).to eq(user_a)