Change redacted output for domain whois query

The redacted text for the email field displays a longer prompt to
contact the registrar, per the request filed at b/123573370.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=232716133

javatests/google/registry/whois/WhoisReaderTest.java

@@ -48,7 +48,7 @@ public class WhoisReaderTest {
   @SuppressWarnings({"TypeParameterUnusedInFormals", "unchecked"})
   <T> T readCommand(String commandStr) throws Exception {
     return (T)
-        new WhoisReader(new WhoisCommandFactory())
+        new WhoisReader(new WhoisCommandFactory(), "Please contact registrar")
             .readCommand(new StringReader(commandStr), false, clock.nowUtc());
   }