title: Eclipse "run as" missing groovy script
body: <p>When I use eclipse to run a groovy file, the "run as" only shows two choices which are "Groovy Console" and "Java Application". It should has a "Groovy Script" as default but currently it does not.</p>
  
  <p>To run the file, I have to use "run configurations" to choose the "Groovy Script". Are there any way that I could add "Groovy Script" back to the "run as" list?</p>