mod reports: include reported user and message in forum post.

Also fix it so that reports against dmails include the key in the dmail
link so that mods can view the reported dmail.

test/factories/dmail.rb

@@ -1,6 +1,9 @@
 FactoryBot.define do
   factory(:dmail) do
-    to :factory => :user
+    owner factory: :user
+    from factory: :user
+    to factory: :user
+    creator_ip_addr { FFaker::Internet.ip_v4_address }
     title {FFaker::Lorem.words.join(" ")}
     body {FFaker::Lorem.sentences.join(" ")}
   end

test/factories/moderation_report.rb

@@ -1,5 +1,6 @@
 FactoryBot.define do
   factory(:moderation_report) do
+    creator
     reason {"xxx"}
   end
 end

test/unit/moderation_reports_test.rb

@@ -0,0 +1,15 @@
+require 'test_helper'
+
+class ModerationReportTest < ActiveSupport::TestCase
+  context "Moderation reports: " do
+    context "creating a moderation report" do
+      should "create a forum post" do
+        @dmail = create(:dmail)
+        @modreport = create(:moderation_report, model: @dmail, reason: "blah")
+
+        assert_equal(2, ForumPost.count)
+        assert_match(/blah/, ForumPost.last.body)
+      end
+    end
+  end
+end