Merge branch 'paranoid_linesearch' into 'NIFTy_7'

Paranoid linesearch

See merge request !557
12 jobs for NIFTy_7 in 26 minutes and 6 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build Docker
passed #1112626
build_docker_from_scratch

00:12:22

 
  Test
passed #1112632
test_mpi

00:00:25

passed #1112630
test_serial

00:05:23

86.0%
 
  Demo Runs
passed #1112650
run_bernoulli

00:00:29

passed #1112652
run_curve_fitting

00:00:27

passed #1112640
run_getting_started_1

00:00:32

passed #1112642
run_getting_started_2

00:01:00

passed #1112645
run_getting_started_3

00:02:04

passed #1112647
run_getting_started_mf

00:07:46

passed #1112635
run_ipynb0

00:01:37

passed #1112637
run_ipynb1

00:00:42

passed #1112654
run_visual_mgvi

00:01:21