include format file verification

[elbraulio]

can be something like this

        this.logger.info("validating " + file.getAbsolutePath());
        int count = 0;
        try (
                BufferedReader br = new BufferedReader(
                        new InputStreamReader(
                                new FileInputStream(file),
                                StandardCharsets.UTF_8
                        )
                )
        ) {
            String line;
            while ((line = br.readLine()) != null) {
                count++;
                this.parser.parse(line);
            }
        } catch (EzParseException e) {
            this.logger.warn("parse error on line " + count + ": " + e.errors());
            return e.errors();
        }
        return new LinkedList<>();

this is already being done when the data is inserting and it will be useful to allow the user to use that in order to verify and test their file formats defined on Parser.

[elbraulio]

#77 and #3 are features that works with parse. This validation is another one. So in that context this feature can be included.