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/testing/DomainResourceSubject.java

@@ -79,6 +79,20 @@ public final class DomainResourceSubject
     return andChainer();
   }
 
+  public And<DomainResourceSubject> hasLastTransferTime(DateTime lastTransferTime) {
+    return hasValue(
+        lastTransferTime,
+        actual().getLastTransferTime(),
+        "has lastTransferTime");
+  }
+
+  public And<DomainResourceSubject> hasLastTransferTimeNotEqualTo(DateTime lastTransferTime) {
+    return doesNotHaveValue(
+        lastTransferTime,
+        actual().getLastTransferTime(),
+        "lastTransferTime");
+  }
+
   public And<DomainResourceSubject> hasDeletePollMessage() {
     if (actual().getDeletePollMessage() == null) {
       fail("has a delete poll message");