[FIX] point_of_sale: set journal as pos payment method on setting journal in the payment methods of a pos config when none is set.
[FIX] auth_ldap: avoid to try twice the authentication to the ldap server

See #1982
[FIX] orm write: do not try to store computed & stored fields for relational records deleted by *2many fields

opw-613772
Merge branch '7.0' into issue-partners-with-invalid-email