Add first gradient tests

9 jobs for linearizationtests in 8 minutes and 6 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build Docker
passed #895013
build_docker_from_cache

00:00:17

 
  Test
passed #895015
test_mpi

00:04:10

passed #895014
test_serial

00:04:49

81.0%
 
  Demo Runs
passed #895020
run_bernoulli

00:00:29

passed #895021
run_curve_fitting

00:00:26

passed #895017
run_getting_started_1

00:00:31

passed #895018
run_getting_started_2

00:01:08

passed #895019
run_getting_started_3

00:02:58

passed #895016
run_ipynb

00:01:22