Move more configuration options into YAML config files

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=145452311

java/google/registry/config/RegistryConfig.java

@@ -1254,6 +1254,11 @@ public final class RegistryConfig {
     }
   }
 
+  /** Returns the roid suffix to be used for the roids of all contacts and hosts. */
+  public static String getContactAndHostRoidSuffix() {
+    return CONFIG_SETTINGS.get().registryPolicy.contactAndHostRoidSuffix;
+  }
+
   /**
    * Memoizes loading of the {@link RegistryConfigSettings} POJO.
    *