Down payment configuration for Loan Products (#1836)

Co-authored-by: Jose Alberto Hernandez <alberto@blue-daemon.local>

src/app/shared/validators/percentage.validator.ts

@@ -0,0 +1,11 @@
+import { AbstractControl, ValidatorFn } from '@angular/forms';
+
+export function rangeValidator(min: number, max: number): ValidatorFn {
+
+  return (control: AbstractControl): { [key: string]: boolean } | null => {
+    if (control.value !== undefined && (isNaN(control.value) || control.value < min || control.value > max)) {
+        return { 'range': true };
+    }
+    return null;
+  };
+}