Fix "minimum-length" option of the "validate-length" JS validation

[adragus-inviqa]

The minimum-length option was incorrectly used because the value had to be empty first in order to be checked, and that's illogical.

[piotrekkaminski]

Internal issue MAGETWO-53552

[PrajapatiChirag]

we need to change lib/web/mage/validation.js

"validate-length": [
            function (v, elm) {
                var reMax = new RegExp(/^maximum-length-[0-9]+$/),
                    reMin = new RegExp(/^minimum-length-[0-9]+$/),
                    validator = this,
                    result = true,
                    length = 0;
                $.each(elm.className.split(' '), function (index, name) {
                    if (name.match(reMax) && result) {
                        length = name.split('-')[2];
/* Need to change message for maximum length validation*/
                        validator.attrLength = 'Maximum length of this field must be equal or less than '+ length +' symbols.';
                        result = (v.length <= length);
                    }
                    if (name.match(reMin) && result && !$.mage.isEmpty(v)) {
                        length = name.split('-')[2];
/* Need to change message for minimum length validation*/
                        validator.attrLength = 'Minimum length of this field must be equal or greater than '+ length +' symbols.';
                        result = v.length >= length;
                    }
                });
                return result;
            }, function () {
/* Need to change for displaying proper message */
                return $.mage.__("%1")
                    .replace('%1', this.attrLength);
            }
        ],