Refactor searching text attributes.

* Allow using ApplicationRecord#attribute_matches to search text attributes,
and standardize models on using this instead of duplicating code.

* Remove restrictions that limited wildcard searches to Builders only in various places.

test/unit/comment_test.rb

@@ -218,7 +218,7 @@ class CommentTest < ActiveSupport::TestCase
         c2 = FactoryBot.create(:comment, :body => "aaa ddd")
         c3 = FactoryBot.create(:comment, :body => "eee")
 
-        matches = Comment.body_matches("aaa")
+        matches = Comment.search(body_matches: "aaa")
         assert_equal(2, matches.count)
         assert_equal(c2.id, matches.all[0].id)
         assert_equal(c1.id, matches.all[1].id)

test/unit/dmail_test.rb

@@ -103,10 +103,10 @@ class DmailTest < ActiveSupport::TestCase
       should "return results based on title contents" do
         dmail = FactoryBot.create(:dmail, :title => "xxx", :owner => @user)
 
-        matches = Dmail.search(title_matches: "x")
+        matches = Dmail.search(title_matches: "x*")
         assert_equal([dmail.id], matches.map(&:id))
 
-        matches = Dmail.search(title_matches: "X")
+        matches = Dmail.search(title_matches: "X*")
         assert_equal([dmail.id], matches.map(&:id))
 
         matches = Dmail.search(message_matches: "xxx")
@@ -118,9 +118,9 @@ class DmailTest < ActiveSupport::TestCase
 
       should "return results based on body contents" do
         dmail = FactoryBot.create(:dmail, :body => "xxx", :owner => @user)
-        matches = Dmail.search_message("xxx")
+        matches = Dmail.search(message_matches: "xxx")
         assert(matches.any?)
-        matches = Dmail.search_message("aaa")
+        matches = Dmail.search(message_matches: "aaa")
         assert(matches.empty?)
       end
     end

test/unit/forum_post_test.rb

@@ -164,8 +164,8 @@ class ForumPostTest < ActiveSupport::TestCase
 
     should "be searchable by body content" do
       post = FactoryBot.create(:forum_post, :topic_id => @topic.id, :body => "xxx")
-      assert_equal(1, ForumPost.body_matches("xxx").count)
-      assert_equal(0, ForumPost.body_matches("aaa").count)
+      assert_equal(1, ForumPost.search(body_matches: "xxx").count)
+      assert_equal(0, ForumPost.search(body_matches: "aaa").count)
     end
 
     should "initialize its creator" do

test/unit/note_test.rb

@@ -196,13 +196,13 @@ class NoteTest < ActiveSupport::TestCase
 
       context "where the body contains the string 'aaa'" do
         should "return a hit" do
-          assert_equal(1, Note.body_matches("aaa").count)
+          assert_equal(1, Note.search(body_matches: "aaa").count)
         end
       end
 
       context "where the body contains the string 'bbb'" do
         should "return no hits" do
-          assert_equal(0, Note.body_matches("bbb").count)
+          assert_equal(0, Note.search(body_matches: "bbb").count)
         end
       end
     end