Fix Result.Code enum values to use UPPER_CAMEL naming

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=133324460

javatests/google/registry/model/domain/DomainResourceTest.java

@@ -431,7 +431,7 @@ public class DomainResourceTest extends EntityTestCase {
     int numPreviousReads = RequestCapturingAsyncDatastoreService.getReads().size();
     EppXmlTransformer.marshal(
         EppOutput.create(new EppResponse.Builder()
-            .setResult(Result.create(Code.Success))
+            .setResult(Result.create(Code.SUCCESS))
             .setResData(ImmutableList.of(domain))
             .setTrid(Trid.create(null, "abc"))
             .build()),