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/config/erpnext_integrations.py

@@ -0,0 +1,22 @@
+from __future__ import unicode_literals
+from frappe import _
+
+def get_data():
+	return [
+		{
+			"label": _("Payments"),
+			"icon": "fa fa-star",
+			"items": [
+				{
+					"type": "doctype",
+					"name": "GoCardless Settings",
+					"description": _("GoCardless payment gateway settings"),
+				},
+				{
+					"type": "doctype",
+					"name": "GoCardless Mandate",
+					"description": _("GoCardless SEPA Mandate"),
+				}
+			]
+		}
+	]