Add words_both_idx to newly created databases.

The changes to the otk and session table done by fix_version_3_tables
look like they were rolled into create_version_2_tables, but the new
index creation wasn't. So call self.fix_version_3_tables() to add the
index.

Author: rouilj

roundup/backends/back_postgresql.py

@@ -196,6 +196,7 @@ def open_connection(self):
             self.sql("CREATE TABLE dual (dummy integer)")
             self.sql("insert into dual values (1)")
             self.create_version_2_tables()
+            self.fix_version_3_tables()
             # Need to commit here, otherwise otk/session will not find
             # the necessary tables (in a parallel connection!)
             self.commit()