Remove deprecated methods with Guava 20 release

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137849843

java/google/registry/tools/AppEngineConnection.java

@@ -163,7 +163,7 @@ class AppEngineConnection implements Connection {
   }
 
   boolean isLocalhost() {
-    return server.getHostText().equals("localhost");
+    return server.getHost().equals("localhost");
   }
 
   private String getUserId() {