LPS-34924 CustomSQLUtil.replaceOrderBy(...) doesn't handle ambiguous columns well

Hi Shuyang,\n\nI think, you are the best person to send this. I've changed the string representation of the table names in the *FinderImpl classes to the appropriate static variables, because I think it's a much better pattern. However, I wouldn't have liked to changed all of the occasions where the table names are prefixes for the columns, because that could be a bit bigger work.\n\nZsigmond