Use .equals() instead of == to compare Strings

Class FormElement:

``` java
       protected boolean isFormElement(WebElement element) {
               if (element == null) {
                       return false;
               }
               String tag = element.getTagName().toLowerCase();
               return tag == "input" || tag == "select" || tag == "textarea" || tag == "button" || tag == "option";
       }
```
