[IMP] theme_*: review s_picture snippet occurrences

The goal of this commit is to fix xpath after the `s_picture` snippet
redesign, and eventually tweak some classes.

task-4047748

closes odoo/design-themes#824

Related: odoo/odoo#172740
Signed-off-by: Arthur Detroux (ard) <ard@odoo.com>

theme_vehicle/views/customizations.xml

@@ -147,7 +147,7 @@
 <template id="s_picture" inherit_id="website.s_picture" name="Vehicle s_picture">
     <!-- Section -->
     <xpath expr="//section" position="attributes">
-        <attribute name="class" add="o_cc5" remove="o_cc2" separator=" "/>
+        <attribute name="class" add="o_cc5" separator=" "/>
     </xpath>
     <!-- Title -->
     <xpath expr="//h2" position="replace">
@@ -159,7 +159,6 @@
     </xpath>
     <!-- Image + Shape -->
     <xpath expr="//img" position="attributes">
-        <attribute name="class" remove="img-thumbnail padding-large" separator=" "/>
         <attribute name="src">/web/image/website.s_picture_default_image</attribute>
         <attribute name="data-file-name">01.svg</attribute>
     </xpath>
@@ -167,7 +166,7 @@
         <span class="text-o-color-3">Our uniquely designed LED headlights are not only gorgeous but powerfully light your way.</span>
     </xpath>
     <!-- Filter -->
-    <xpath expr="//div[hasclass('container')]" position="before">
+    <xpath expr="//div[hasclass('o_container_small')]" position="before">
         <div class="o_we_bg_filter bg-black-50"/>
     </xpath>
 </template>