* Fix fungible unbalanced trait * Add simple decrease_balance test Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> * Fix decrease_balance_at_most * Fix decrease_balance_at_most in fungibles * Rename free_balanceto balance_on_free * Use reducible_balance instead of balance_on_free Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>