GWF namefile and modelname mismatch for parent

[mnfienen]

when specifying a namefile in the parent block, this gets ".nam" stripped off and mfsetup looks for the resulting string as the model name. But, the namefile isn't required by MF6 to match the namefile root, so perhaps we need to look for both.

Example from a mfsim.nam file:
BEGIN MODELS
GWF6 nameroot.nam some_other_name
END MODELS