Improved bulkload error handling (#8491)

* log the config file path used by the server on startup

* return an err if the bulk import command fails

* log the underlying errors that occur when importing

The code assumed all errors meant a missing resource, but it's possible
something else is at fault. Including the error helps pinpoint that more
readily.

cmd/commands/import.go

@@ -130,6 +130,7 @@ func bulkImportCmdF(command *cobra.Command, args []string) error {
 		if lineNumber != 0 {
 			cmd.CommandPrettyPrintln(fmt.Sprintf("Error occurred on data file line %v", lineNumber))
 		}
+		return err
 	} else {
 		if apply {
 			cmd.CommandPrettyPrintln("Finished Bulk Import.")