Update the testing suite from FunSuite to AnyFunSuite

[dagmendez]

Hello,

The actual implementation of the template for the testing class has a not longer available testing suite, causing the generated project from the template to crush during compilation.

In the actual version of the template, this is the code for the test:

package $organization$.$name$

/**
 * A simple test for everyone's favourite wordcount example.
 */

import com.holdenkarau.spark.testing.SharedSparkContext
import org.scalatest.FunSuite

class WordCountTest extends FunSuite with SharedSparkContext {

Could it be updated to this?:

package $organization$.$name$

/**
 * A simple test for everyone's favourite wordcount example.
 */

import com.holdenkarau.spark.testing.SharedSparkContext
import org.scalatest.funsuite.AnyFunSuite

class WordCountTest extends AnyFunSuite with SharedSparkContext {

Thank you.