adjust to new gridder interface

9 jobs for PowerGrid in 3 minutes and 24 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build Docker
passed #818909
build_docker_from_cache

00:00:15

 
  Test
canceled #818911
test_mpi

00:03:09

canceled #818910
test_serial

00:03:09

 
  Demo Runs
canceled #818916
run_bernoulli

canceled #818917
run_curve_fitting

canceled #818913
run_getting_started_1

canceled #818914
run_getting_started_2

canceled #818915
run_getting_started_3

canceled #818912
run_ipynb