Gocardless integration (#13008)

* GoCardless integration

* Addition of a method for determining if the email should be sent or not

* Correction for Tests

* Codacy fix

* Documents moved to ERPNext

* Codacy fix

* Codacy fixes

* Remove method where not necessary and replace with hasattr

erpnext/templates/pages/integrations/gocardless_confirmation.html

@@ -0,0 +1,16 @@
+{% extends "templates/web.html" %}
+
+{% block title %} Payment {% endblock %}
+
+{%- block header -%}{% endblock %}
+
+{% block script %}
+<script>{% include "templates/includes/integrations/gocardless_confirmation.js" %}</script>
+{% endblock %}
+
+{%- block page_content -%}
+<p class='lead text-center centered'>
+	<span class='gocardless-loading'>{{ _("Payment Confirmation") }}</span>
+</p>
+
+{% endblock %}