Changed property name="hbm2ddl.auto" in the config to "validate" since
"update" is dangerous in production. Manually added new LONGTEXT
original_text column to ITEMS table and finally got it to work
correctly. Since hibernate expected a few varchars where we actually had
longtexts, I had to add some @Column(columnDefinition="LONGTEXT")
annotations to Globalvar, Item and User. 

After a while, I need to take a DO snapshot to save this working state
with the new column.