mdrun should not advise users of things that don't matter - Redmine #1992

At https://mailman-1.sys.kth.se/pipermail/gromacs.org_gmx-users/2016-June/106482.html the advice from mdrun upon restart that the number of nodes is different was confusing to a user, and meant that they didn’t focus on the real problem.

There are many ways in which ostensibly equivalent mdrun calls will differ, so we should not differentiate a restart on a different number of ranks, or a different build of GROMACS, as something a user needs to know about. There’s no case where they need to take action, and it’s not likely to be an accident of concern, either. Since the restart always writes the information about mdrun (even when appending) there is no (longer) any need to say anything about version/build/build user/parallelism mismatch.

(from redmine: issue id 1992, created on 2016-06-16 by mark.j.abraham, closed on 2016-06-22)

• Changesets:
  • Revision 2d884394 by Berk Hess on 2016-06-19T20:44:16Z:

Remove warnings on checkpoint mismatch

mdrun now only warns for mismatch in minor version, build or
number of ranks used when reproducibility is requested.
Also added a separate message for not matching precision.

Fixes #1992.

Change-Id: Ia20e6beff86484f0b70148c155cdb53fed012136