Fix #7169 : Unknown column 'ba.accountancy_journal' in member's subcription

Fix: php 5.6 is ok now (travis)

FIX copy-paste error (sell versus buy)

Notes: please review carefully before accepting. patch propagation. manual test run. 
Reviewed By: https://github.com/dchichkov 
Cherry picked from:
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From 0d62bd70 Mon Sep 17 00:00:00 2001
From: Juanjo Menent <jmenent@2byte.es>
Date: Wed, 22 Jun 2016 18:59:51 +0200
Subject: [PATCH] Fix: Bad column totalizing if MAIN_SHOW_HT_ON_SUMMARY activated

Conflicts:
	htdocs/accountancy/journal/bankjournal.php

Conflicts:
	htdocs/supplier_proposal/class/supplier_proposal.class.php

Debug edition of user BAN.

Conflicts:
	htdocs/accountancy/journal/bankjournal.php
	htdocs/compta/bank/bankentries.php
	htdocs/install/mysql/migration/4.0.0-5.0.0.sql