[FIX] barcodes: fix several issues when scanning barcodes

Since the new views, most of the barcodes feature was
broken. This commit re-enables the support of commands like
'edit', 'save', 'cancel', 'previous' and 'next'.

Also changed javascript event handler to jquery event handler to
make barcodes testable in phantomjs.

addons/barcodes/views/barcodes_templates.xml

@@ -10,4 +10,10 @@
             </xpath>
         </template>
 
+        <template id="qunit_suite" name="barcode_tests" inherit_id="web.qunit_suite">
+            <xpath expr="//t[@t-set='head']" position="inside">
+                <script type="text/javascript" src="/barcodes/static/tests/barcode_tests.js"/>
+            </xpath>
+        </template>
+
 </odoo>