Fix generics in EppXmlTransformer.unmarshal to not be only on the return type.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=124914271

javatests/google/registry/flows/domain/DomainApplicationCreateFlowTest.java

@@ -1140,6 +1140,7 @@ public class DomainApplicationCreateFlowTest
         .setCreateBillingCost(Money.of(EUR, 13))
         .setRestoreBillingCost(Money.of(EUR, 11))
         .setRenewBillingCostTransitions(ImmutableSortedMap.of(START_OF_TIME, Money.of(EUR, 7)))
+        .setEapFeeSchedule(ImmutableSortedMap.of(START_OF_TIME, Money.zero(EUR)))
         .setServerStatusChangeBillingCost(Money.of(EUR, 19))
         .build());
     persistContactsAndHosts();