Regtest: Reduce number of MD steps

git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@14391 bac0169d-1eea-4375-b5f6-f89d2ced9994
Adjust tolerances

git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@14392 bac0169d-1eea-4375-b5f6-f89d2ced9994