ENGCOM-1639: [Backport] Fix to allow use decimals less then 1 in subproducts qty #15407

 - Merge Pull Request #15407 from rogyar/magento2:2.1-js-validation-fix
 - Merged commits:
   1. e8087c5

Author: magento-engcom-team

lib/web/mage/validation/validation.js

@@ -25,7 +25,7 @@
                     var val = $(e).val();
                     if (val && val.length > 0) {
                         result = true;
-                        var valInt = parseInt(val, 10) || 0;
+                        var valInt = parseFloat(val) || 0;
                         if (valInt >= 0) {
                             total += valInt;
                         } else {