I install this module in v8.0 but error
ParseError: "External ID not found in the system: sale_order_types.sales_journal"
<p><record id="normal_sale_type" model="sale.order.type">
<field name="name">Normal Order</field>
<field name="warehouse_id" ref="stock.warehouse0"/>
<field name="sequence_id" ref="sale.seq_sale_order"/>
<field name="journal_id" ref="sales_journal"/>
</record></p>
sales_journal id is not available in your module. It's available on account module so we need to use that.
Try this,
<record id="normal_sale_type" model="sale.order.type">
<field name="name">Normal Order</field>
<field name="warehouse_id" ref="stock.warehouse0"/>
<field name="sequence_id" ref="sale.seq_sale_order"/>
<field name="journal_id" ref="account.sales_journal"/>
</record>
EDIT :
sales_journal
id is related with demo data. So make sure you loaded demo data.