Retrieve session without any implicit ordering

Author: denisj

Diff for: lib/active_record/session_store/session.rb

@@ -48,7 +48,7 @@ def self.find_by_session_id(session_id)
               class << self; remove_possible_method :find_by_session_id; end
 
               def self.find_by_session_id(session_id)
-                where(session_id: session_id).first
+                where(session_id: session_id).take
               end
             end
           end