Update example-sparkcompute/src/test/java/org/example/ExampleTest.java

[kevllino]

Hi @nitinmotgi @elfenheart,

New CDAP user here, I'm trying to write tests for my custom spark compute plugin. I couldn't find many examples with recent versions of CDAP and spark. This was the best source, unfortunately, the example in this project is partly commented and also, it looks like it's not up to date as builder("scheduling_interval") is deprecated for example. Can you please update the existing example or point to an example if it exists? That'd be very helpful for new users of CDAP.

Thanks in advance,
Kevin