title: H2 in-memory database initialization with data
body: <p>I'm using H2 with Hibernate to generate in-memory DB on the fly for unit-testing.
  I managed to create the DB successfully, and everything is working ok.
  But I have an issue I don't know how to approach.
  I need to load reference data to the DB for testing prior to the execution of the tests.
  I have this data sored as a SQL insert's file which I need to run only once in real time envirnemnt, however, because the DB is generated every time from scratch I need to figure out how to insert the data on runtime.
  The data is quite simple, it's countries lists, states list, etc.
  Whats the best way to do it ?</p>
  
  <p>btw, everything is working underneath Spring framework.</p>