Fix cosmetic issue in account listing

When you have long id names, or long account names, or both, you may
have some formatting issue where balance and coming values are not properly
aligned.
This patch fixes this alignment issue, and allows the possibility to
easily change the column width in the future.
(If there is interest in it, it's certainly possible to fetch column width
either from cli parameters, configuration or environment variables)
7 jobs for 206-cosmetic-accountlistformatter in 21 minutes and 44 seconds (queued for 17 minutes and 42 seconds)
latest
Status Job ID Name Coverage
  Build
passed #28719
build:3

00:01:47

 
  Test
passed #28722
load-modules:3

00:02:33

passed #28720
pyflakes:3

00:02:32

passed #28721
pyflakes-strict:3

00:02:36

passed #28723
unittests:3

00:02:22

failed #28724
allowed to fail
unittests-modules:3

00:13:05

 
  Deploy
passed #28725
doc:3

00:02:21

 
Name Stage Failure
failed
unittests-modules:3 Test
-----------------------------------------------------------------------
TOTAL 70493 41416 41%
----------------------------------------------------------------------
Ran 370 tests in 621.062s

FAILED (SKIP=112, errors=156, failures=31)
=== Total coverage ===
MODULES COVERAGE: 41%
ERROR: Job failed: exit code 1