Fix wrong default rounding of quantity for invoice

The default digits of quantity is 2 so the default rounding must be 0.01

issue4374
review11671003
(grafted from 099ed666ac0c7fe944746d92c3c1cd1746c0fe8f)

--HG--
branch : 3.2
extra : source : 099ed666ac0c7fe944746d92c3c1cd1746c0fe8f
Sync dependencies in INSTALL

issue4379
review7741002
(grafted from b8ebb015e939c8fbe8fe5381aaa05014abf2039e)

--HG--
branch : 3.2
extra : source : b8ebb015e939c8fbe8fe5381aaa05014abf2039e
extra : amend_source : 7f8a1d2247c19d20d6785fe4904acd74cc2bd2d4