Aliases for column name

[vkorobkov]

If column names are too long or too difficult there may be useful to use shorter/better aliases to them in fixtures files.

Probably the scope of column aliases must be only for yaml fixtures, all the configuration should use original column names just like these are in the DB

[vkorobkov]

Closing as too confusing suggestion:

• What if alias intersects with another real column name?
• Can foreign key use aliases?
• Aliases in data but real column names in configs?