Scope down lastTransferTime to only ContactResource, DomainResource

and HostResource.

DomainApplication is not transferable and has no need for this
field. HostResource needs it because it can be transferred with
a domain.

This is all in service of removing the ofy().load() inside of
host's cloneProjectedAtTime.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139346925

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

@@ -72,7 +72,6 @@ public class DomainApplicationTest extends EntityTestCase {
             .setCreationClientId("a registrar")
             .setLastEppUpdateTime(clock.nowUtc())
             .setLastEppUpdateClientId("another registrar")
-            .setLastTransferTime(clock.nowUtc())
             .setStatusValues(ImmutableSet.of(
                 StatusValue.CLIENT_DELETE_PROHIBITED,
                 StatusValue.SERVER_DELETE_PROHIBITED,