Fix dev-data.py imports
Traceback (most recent call last):
File "dev-data.py", line 592, in <module>
eng, meta = init_database()
File "dev-data.py", line 48, in init_database
engine = pagure.lib.query.create_engine('%s' % DB_URL, echo=True)
AttributeError: 'module' object has no attribute 'create_engine'