[IMP]add support for fintech 7.4

In fintech 7.4 EbicsUser.manual_approval has been replaced by class parameter “transport_only”.
The account_ebics code has now been adapted to support fintech >=7.4 as well as older releases.

account_ebics/__manifest__.py

@@ -3,7 +3,7 @@
 
 {
     "name": "EBICS banking protocol",
-    "version": "16.0.1.6.1",
+    "version": "16.0.1.6.2",
     "license": "LGPL-3",
     "author": "Noviat",
     "website": "https://www.noviat.com/",