Use localhost for host_href

This change updates the acceptance tests to specify
http://localhost:9311 for the acceptance tests to prevent any external
network access attempts during testing.

Change-Id: I1fb742b2459b149a4bb634c5b83bdcfcefac0deb

spec/acceptance/basic_barbican_spec.rb

@@ -25,7 +25,8 @@ describe 'barbican::api class' do
           }
 
           class { '::barbican::api':
-            enabled_certificate_plugins => ['simple_certificate','dogtag']
+            enabled_certificate_plugins => ['simple_certificate','dogtag'],
+            host_href                   => 'http://localhost:9311'
           }
         }
       }