[base] workaround of get_status when ogs6_obj contains include element

    the problem is that files references by an include tag
    in PRJ files may contain content of prj-classes that are
    required to start in OGS6 object. If the included file is not read
    in, but only referenced, the simulation still works as the content
    is in the referenced file but not in the OGS6 object. Here, get_status
    would thrown an error.

R/sim_utils.R

@@ -68,7 +68,8 @@ ogs6_export_sim_files <- function(ogs6_obj,
 
     # Call all validators
     if(!test_mode &&
-       !ogs6_obj$get_status(print_status = FALSE)){
+       !ogs6_obj$get_status(print_status = FALSE) &&
+       is.null(ogs6_obj$include)){ # joboog: this is a workaround for now
         stop("There are some components missing from your OGS6 object.",
              call. = FALSE)
     }