#16 column tag cofiguration for non-existent db column should error

[Vladimir Alarcon]

If a <column> tag is defined for a non-existent column there's no warning or error. Example:

<column name="cha10" java-type="byte[]" />

but the column "cha10" does not exist.

The prepare() phase thata validates the configuration and metadata should show the error and stop the execution.