Search facets show translated boolean values

Created format method for getting translated messages for boolean values - IPA.boolean_format.

Used in hosts, sudo rules, hbac rules and hbac test.

https://fedorahosted.org/freeipa/ticket/2027

install/ui/host.js

@@ -39,7 +39,8 @@ IPA.host.entity = function(spec) {
                 'description',
                 {
                     name: 'has_keytab',
-                    label: IPA.messages.objects.host.enrolled
+                    label: IPA.messages.objects.host.enrolled,
+                    format: IPA.boolean_format
                 }
             ]
         }).