Fix and consolidate firewall rules

Most of them are already defined in the appropriate recipe. And one can
be moved. (These are currently opened on every server for no reason.)

site-cookbooks/5apps-xmpp_server/recipes/default.rb

@@ -10,7 +10,7 @@
 unless node.chef_environment == "development"
   include_recipe "firewall"
   firewall_rule "xmpp" do
-    port     [5222, 5269]
+    port     [5222, 5269, 5281]
     protocol :tcp
     command  :allow
   end

site-cookbooks/kosmos-base/recipes/firewall.rb

@@ -38,27 +38,3 @@ firewall_rule 'mosh' do
   protocol :udp
   command  :allow
 end
-
-firewall_rule 'prosody_http_upload' do
-  port     5281
-  protocol :tcp
-  command  :allow
-end
-
-firewall_rule 'hubot_express_hal8000' do
-  port     8080
-  protocol :tcp
-  command  :allow
-end
-
-firewall_rule 'hubot_express_botka_xmpp' do
-  port     8082
-  protocol :tcp
-  command  :allow
-end
-
-firewall_rule 'hubot_express_schlupp_xmpp' do
-  port     8083
-  protocol :tcp
-  command  :allow
-end