[FIX] account: do not validate move when novalidate is in context

The key 'novalidate' is added in the context when an operation not impacting
the validation of a move is made. The validation recreates analytic lines
which decrease the performances.

In case of registrating a payment, the skipped validation are the one from
the reconcile method (reconciliation does not change the validity)
Fixes #3787, opw 618529

addons/account/account_move_line.py

@@ -1197,7 +1197,7 @@ class account_move_line(osv.osv):
             if journal.centralisation:
                 self._check_moves(cr, uid, context=ctx)
         result = super(account_move_line, self).write(cr, uid, ids, vals, context)
-        if check:
+        if check and not context.get('novalidate'):
             done = []
             for line in self.browse(cr, uid, ids):
                 if line.move_id.id not in done: