Merge branch 'feature/constraints' into 'develop'

Boundary conditions and Constraints

See merge request !71
4 jobs for develop
Status Job ID Name Coverage
  Test
canceled #7945
debian:10 clang-6-libcpp-17

canceled #7944
debian:10 gcc-8-17

canceled #7946
debian:9 gcc-6-14

canceled #7947
ubuntu:18.04 clang-6-17