odoo connector: explicitly close the http connection.
odoo connector: explicitly close the http connection.

So far the connection was only closed when the GC removed the
variable that went out of scope. If the GC doesn't kick in the
connection stays open.

frePPLe/frePPLe,frePPLe/frePPLe,frePPLe/frePPLe,frePPLe/frePPLe,frePPLe/frePPLe,frePPLe/frePPLe