Update DuckDuckGo Selectors

[TurekBot]

While trying to follow the "Your First Web Test", I noticed that it wasn't working for me.

I looked into it and found that those selectors don't exist anymore; I've replaced them here with ones that do.

However, even with the good selectors, the submit button stays disabled.

I figure this could be a security measure from DDG—or maybe just a bug.

To get around this, you can just send enter, I suppose
$("#searchbox_input").sendKeys(Keys.ENTER);

[TurekBot]

Something I just noticed is that you say to use commands like "mvn verify", but those commands won't work for most people because most people don't have maven installed.

Two approaches come to mind:

1. Use ./gradlew test instead since it has a wrapper and will automatically download gradle
2. Change the template to use a maven wrapper; and then use ./mvnw

[TurekBot]

Another thing you might consider is turning headless off for this first test. I'm not sure first-timers are better off flying blind. (Especially in the current situation where the first test instructions are broken).