Fix usage of print to logging

9 jobs for nifty6_logging in 8 minutes and 58 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build Docker
passed #978732
build_docker_from_cache

00:00:20

 
  Test
passed #978734
test_mpi

00:06:22

passed #978733
test_serial

00:06:47

82.0%
 
  Demo Runs
passed #978739
run_bernoulli

00:00:39

passed #978740
run_curve_fitting

00:00:38

passed #978736
run_getting_started_1

00:00:45

passed #978737
run_getting_started_2

00:01:09

passed #978738
run_getting_started_3

00:01:49

passed #978735
run_ipynb

00:01:37