Merge branch 'switch_to_ducc' into 'NIFTy_7'

Switch to DUCC

See merge request !530
12 jobs for NIFTy_7 in 13 minutes and 9 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build Docker
passed #1103518
build_docker_from_cache

00:00:17

 
  Test
passed #1103520
test_mpi

00:00:19

passed #1103519
test_serial

00:05:02

86.0%
 
  Demo Runs
passed #1103527
run_bernoulli

00:00:31

passed #1103528
run_curve_fitting

00:00:29

passed #1103523
run_getting_started_1

00:00:34

passed #1103524
run_getting_started_2

00:01:00

passed #1103525
run_getting_started_3

00:02:34

passed #1103526
run_getting_started_mf

00:07:49

passed #1103521
run_ipynb0

00:01:36

passed #1103522
run_ipynb1

00:00:42

passed #1103529
run_visual_mgvi

00:01:23