Handle blank or invalid cloumn names

If the column name has trailing space or is an empty string then handle that and also log it

Currently, it gives an error like

```
MyXQL.Error{connection_id: 78, message: "(1166) (ER_WRONG_COLUMN_NAME) Incorrect column name 'Sub-Skill Areas '", mysql: %{code: 1166, name: :ER_WRONG_COLUMN_NAME},
```