slapos_accounting: calculating the outstanding deposit amount need to also...

slapos_accounting: calculating the outstanding deposit amount need to also check the balance which include the VAT

Test: ensure a second service can be ordered
12 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed SlapOS-Master.UnitTest-Master

02:28:15

failed SlapOS.Eggs.UnitTest-Master.Python2

00:29:58

failed SlapOS.Eggs.UnitTest-Master.Python3

00:43:14

passed SlapOS-Master.UnitTest-Master

01:53:29

failed SlapOS-Master.UnitTest-Master

02:58:18

failed SlapOS-Master.UnitTest-Master

02:52:12

failed SlapOS.Eggs.UnitTest-Master.Python2

00:32:37

failed SlapOS.Eggs.UnitTest-Master.Python2

00:30:04

failed SlapOS.Eggs.UnitTest-Master.Python2

00:26:21

failed SlapOS.Eggs.UnitTest-Master.Python3

00:26:08

failed SlapOS.Eggs.UnitTest-Master.Python3

00:33:04

failed SlapOS.Eggs.UnitTest-Master.Python3

00:29:52