Add separate file for replace_properties

Also, created a script called process_html.sh which reads the amazon
docs about resource properties and finds the ones that require
replacement.  This output can be pasted into the new
replace_properties.rb file.  Unfortunately, there's a lot of them (some
which we may not need now but will later) so I had to disable rubocop
whining about the class length.

Also fixed some other rubocop issues.

Author: rdickey

lib/convection/model/diff.rb

@@ -1,4 +1,5 @@
 require_relative './mixin/colorize'
+require_relative './replace_properties'
 
 module Convection
   module Model
@@ -14,29 +15,23 @@ class Diff
       attr_reader :theirs
       colorize :action, :green => [:create], :yellow => [:update], :red => [:delete, :replace]
 
-      # Properties for which a change requires a replacement
-      # (as opposed to an in-place update)
-      REPLACE_PROPERTIES = [
-        "AWS::Route53::HostedZone.Name",
-        # TODO: Add more
-      ]
-
       def initialize(key, ours, theirs)
         @key = key
         @ours = ours
         @theirs = theirs
 
-        @action = :delete
-        if ours && theirs
-          property_name = key[/AWS::[A-Za-z0-9:]+\.[A-Za-z0-9]+/]
-          if REPLACE_PROPERTIES.include? property_name
-            @action = :replace
-          else
-            @action = :update
-          end
-        elsif ours
-          @action = :create
-        end
+        @action = if ours && theirs
+                    property_name = key[/AWS::[A-Za-z0-9:]+\.[A-Za-z0-9]+/]
+                    if REPLACE_PROPERTIES.include?(property_name)
+                      :replace
+                    else
+                      :update
+                    end
+                  elsif ours
+                    :create
+                  else
+                    :delete
+                  end
       end
 
       def to_thor