[FIX] product: Print "Products Labels"

The number of characters must be taken into account to print the
barcode. With 13 characters -> EAN13, with 8 characters -> EAN8 else
-> Code128

Backport of 12b11c1e

opw:1849965

addons/product/report/product_product_templates.xml

@@ -17,7 +17,9 @@
             <tbody>
                 <tr style="width: 1in;">
                     <td style="border: 2px solid black;text-align: center; vertical-align: middle;" class="col-xs-5">
-                        <img t-if="product.barcode" t-att-src="'/report/barcode/?type=%s&amp;value=%s&amp;width=%s&amp;height=%s' % ('EAN13', product.barcode, 600, 150)" style="width:100%;height:20%;"/>
+                        <img t-if="product.barcode and len(product.barcode) == 13" t-att-src="'/report/barcode/?type=%s&amp;value=%s&amp;width=%s&amp;height=%s' % ('EAN13', product.barcode, 600, 150)" style="width:100%;height:20%;"/>
+                        <img t-elif="product.barcode and len(product.barcode) == 8" t-att-src="'/report/barcode/?type=%s&amp;value=%s&amp;width=%s&amp;height=%s' % ('EAN8', product.barcode, 600, 150)" style="width:100%;height:20%;"/>
+                        <img t-else="" t-att-src="'/report/barcode/?type=%s&amp;value=%s&amp;width=%s&amp;height=%s' % ('Code128', product.barcode, 600, 150)" style="width:100%;height:20%;"/>
                         <span t-field="product.barcode"/>
                     </td>
                     <td style="border: 2px solid black; text-align: center;" class="col-xs-7">