Adjustment on #1711, more explicit clearing of inactive transactions from thread local

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

@@ -133,6 +133,11 @@ public interface SpiEbeanServer extends ExtendedServer, EbeanServer, BeanLoader,
    */
   void externalModification(TransactionEventTable event);
 
+  /**
+   * Clear an implicit transaction from the scope.
+   */
+  void clearServerTransaction();
+
   /**
    * Begin a managed transaction (Uses scope manager / ThreadLocal).
    */