Just started with Hibernate and I think I have the same issue. It stops at

alter table Person
drop
foreign key FK8E488775B78CE81F
waiting for a table metadata lock
Java 1.7

I didn't try it with Java 1.6 but I had a init of Hibernate on each test method(@Before).
Try to init Hibernate just once with @BeforeClass it maybe a better solution than switching to Java 1.6
I was about to give up and found this thanks.