#1427 - QueryCache should be cleared, if one of a dependent bean is updated

Initial work, does not include propagation across cluster.

src/main/java/io/ebeaninternal/api/SpiTransactionProxy.java

@@ -30,6 +30,11 @@ public abstract class SpiTransactionProxy implements SpiTransaction {
     return transaction.translate(message, cause);
   }
 
+  @Override
+  public long getStartMillis() {
+    return transaction.getStartMillis();
+  }
+
   @Override
   public void setLabel(String label) {
     transaction.setLabel(label);