checkpointing incorrect for simulations with . in name

[Samuel Parkinson]

When running in parallel with a simulation that contains a . in the simulation name i.e. test.01 the checkpoint files are named in a way that isn't recognised when trying to rerun from a checkpoint.

As an example, the filepath for the vtu files become:
test.01_PressureMesh_140_checkpoint/test_**.vtu
instead of what is expected:
test.01_PressureMesh_140_checkpoint/test.01_PressureMesh_140_checkpoint_**.vtu
where ** is the process number

Which results in not being able to rerun from the checkpoint without first renaming all of the files.

[Simon Mouradian (mouradian)]

I confirm this is indeed a bug. Attached is an example which fails. To reproduce, try the following commands:

mpiexec -n 2 fluidity -v2 -l ismip_config.flml
mpiexec -n 2 bin/fluidity -v2 -l ismip.hom_3_checkpoint.flml

Changing the 'simulation_name' in the .flml to one without a dot (.) fixes the problem.