title: how to kill drivers after running the automation scripts
body: <p>I am trying to run the automation scripts using java-Selenium TestNG.
  For opening browser I have invoked chrome driver. even after stopping  the scripts the chrome driver is running in Background process in task manager. 
  For ex If I execute my script for 20 time then the chrome driver is running for 20 time in the task manager. I didnt face any issue because of this problem. but still wanted to know should I add anything in my script to stop those drivers? . Will it cause any issue in the future ?</p>