Merge branch 'parallizing_mirrored_samples' into 'NIFTy_5'

parallelization for mirrored KL

See merge request !301
11 jobs for NIFTy_5 in 23 minutes and 9 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build Docker
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build_docker_from_scratch

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  Test
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test_mpi

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test_serial

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81.0%
 
  Release
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pages

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  Demo Runs
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run_bernoulli

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run_curve_fitting

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run_getting_started_1

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run_getting_started_2

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passed #903463
run_getting_started_3

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passed #903460
run_ipynb

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  Deploy
passed pages:deploy

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