BUG: Wrong FatalIOError message in displacementMethod and optMeshMovement (#1537)
- The core of the FatalIOError message was not printed due to exiting with FatalError instead of FatalIOError
- Changed the TypeName in all derived classes of displacementMethod so that the toc printed by the FatalIOError corresponds to what the user should add in dynamicMeshDict
Edited by Vaggelis Papoutsis