alias/implications: fixup uses of creator_ip_addr.

Fixup for a2ea2a65a. Use 127.0.0.1 rather than the creator's original IP
for any edits performed as part of an alias or implication.

app/models/tag_alias.rb

@@ -141,7 +141,7 @@ class TagAlias < TagRelationship
       Post.raw_tag_match(antecedent_name).find_each do |post|
         escaped_antecedent_name = Regexp.escape(antecedent_name)
         fixed_tags = post.tag_string.sub(/(?:\A| )#{escaped_antecedent_name}(?:\Z| )/, " #{consequent_name} ").strip
-        CurrentUser.scoped(creator, creator_ip_addr) do
+        CurrentUser.scoped(creator, "127.0.0.1") do
           post.update(tag_string: fixed_tags)
         end
       end
@@ -152,7 +152,7 @@ class TagAlias < TagRelationship
     antecedent_wiki = WikiPage.titled(antecedent_name).first
     if antecedent_wiki.present? 
       if WikiPage.titled(consequent_name).blank?
-        CurrentUser.scoped(creator, creator_ip_addr) do
+        CurrentUser.scoped(creator, "127.0.0.1") do
           antecedent_wiki.update(title: consequent_name, skip_secondary_validations: true)
         end
       else
@@ -162,7 +162,7 @@ class TagAlias < TagRelationship
 
     if antecedent_tag.category == Tag.categories.artist
       if antecedent_tag.artist.present? && consequent_tag.artist.blank?
-        CurrentUser.scoped(creator, creator_ip_addr) do
+        CurrentUser.scoped(creator, "127.0.0.1") do
           antecedent_tag.artist.update!(name: consequent_name)
         end
       end

app/models/tag_implication.rb

@@ -159,7 +159,7 @@ class TagImplication < TagRelationship
       Post.without_timeout do
         Post.raw_tag_match(antecedent_name).where("true /* TagImplication#update_posts */").find_each do |post|
           fixed_tags = "#{post.tag_string} #{descendant_names_string}".strip
-          CurrentUser.scoped(creator, creator_ip_addr) do
+          CurrentUser.scoped(creator, "127.0.0.1") do
             post.update(tag_string: fixed_tags)
           end
         end