Adding domain blocks

spec/fabricators/domain_block_fabricator.rb

@@ -0,0 +1,3 @@
+Fabricator(:domain_block) do
+  domain "MyString"
+end

spec/fabricators/media_attachment_fabricator.rb

@@ -1,6 +1,2 @@
 Fabricator(:media_attachment) do
-  status_id  1
-  file       ""
-  remote_url "MyString"
-  account_id 1
 end