Rename namespace collision_kernel according to guidelines

See merge request !450

Probe concentration

See merge request !446

change container for regressiontests and performancetests to version 1.3

See merge request !448

refactoring the namespaces

See merge request !447

Merge branch 'refactoringNamespaces' of https://git.rz.tu-bs.de/m.schoenherr/VirtualFluids_dev into refactoringNamespaces

This reverts commit 36813014.