Check if binaries exist if needed in fm_well_trajectory

[slawekszklarz]

Currently we are providing a path to a simulation ‘’MODEL”. Minimum requirement for ResInsight is for MODEL.EGRID to exist. However, this is not sufficient for well trajectory because since MODEL.INIT file is also needed. If INIT is missing then empty COMPDAT file is exported with corresponding info in the log:

ERROR: Compdat Export : One or more of the following required data sources are missing : PERMX PERMY PERMZ DX DY DZ

Adding check fort existence of INIT would fix the issue. In addition, if at least one dynamic perforation is specified (section 'dynamic' is present in the YAML input file) then a check for existence of UNRST file should be performed.