[IMP] Show a default 'OCA' icon on product

When the related module has no icon, show a default 'OCA' icon
from the static path.

website_apps_store/views/templates.xml

@@ -87,7 +87,16 @@
             <xpath expr='//div[hasclass("product_price")]//span[@t-esc="product.website_price"]' position="replace">
                 <span t-esc="product.website_price" t-options="{'widget': 'monetary', 'display_currency': website.currency_id}" t-if="not product.odoo_module_id"/>
             </xpath>
-
+            <xpath expr="//div[hasclass('oe_product_image')]/a/span" position="replace">
+                <t t-if="product.image or not product.odoo_module_id" >
+                    <span itemprop="image" t-attf-content="{{request.httprequest.url_root}}web/image/product.template/{{product.id}}/image" t-field="product.image" t-options="{'widget': 'image', 'resize': None if product_image_big else '300x300', 'zoom': 'image'}" t-att-alt="product.name" />
+                </t>
+                <t t-else="">
+                    <span itemprop="image" t-att-alt="product.name">
+                        <img class="img img-responsive" t-attf-src="{{request.httprequest.url_root}}website_apps_store/static/src/img/oca.png" t-options="{'widget': 'image', 'zoom': 'image'}" t-att-alt="product.name" />
+                    </span>
+                </t>
+            </xpath>
         </template>
 
         <!--Product Customization /-->
@@ -204,6 +213,16 @@
                     <p t-esc="product_var_id.app_description_rst_html" t-options='{"widget": "html"}'/>
                 </div>
             </xpath>
+            <xpath expr="//span[contains(@t-field, 'product.image')]" position="replace">
+                <t t-if="product.image or not product.odoo_module_id" >
+                    <span itemprop="image" t-attf-content="{{request.httprequest.url_root}}web/image/product.template/{{product.id}}/image" t-field="product.image" t-options="{'widget': 'image', 'class': 'product_detail_img', 'alt-field': 'name', 'zoom': 'image'}" groups="!website_sale.group_website_multi_image"/>
+                </t>
+                <t t-else="">
+                    <span itemprop="image" t-att-alt="product.name" >
+                        <img class="img img-responsive product_detail_img" t-attf-src="{{request.httprequest.url_root}}website_apps_store/static/src/img/oca.png" t-options="{'widget': 'image', 'zoom': 'image'}" t-att-alt="product.name" />
+                    </span>
+                </t>
+            </xpath>
         </template>
         <template id="product_quantity_customize" inherit_id="website_sale.product_quantity">
             <xpath expr='//div[hasclass("css_quantity")]' position="attributes">