[SW-2479] Show Stack Trace of Exceptions in Failed Tests

[mn-mikke]

The current state:

ai.h2o.sparkling.DataSourceTestSuite > Reading H2OFrame using key option FAILED
    org.scalatest.exceptions.TestFailedException at DataSourceTestSuite.scala:41

After this change:

ai.h2o.sparkling.DataSourceTestSuite > Reading H2OFrame using key option FAILED
    org.scalatest.exceptions.TestFailedException: 1 equaled 1 Number of columns should match
        at org.scalatest.Assertions.newAssertionFailedException(Assertions.scala:530)
        at org.scalatest.Assertions.newAssertionFailedException$(Assertions.scala:529)
        at org.scalatest.FunSuite.newAssertionFailedException(FunSuite.scala:1560)
        at org.scalatest.Assertions$AssertionsHelper.macroAssert(Assertions.scala:503)
        at ai.h2o.sparkling.DataSourceTestSuite.$anonfun$new$1(DataSourceTestSuite.scala:41)
        at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
        at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:83)
        at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
        at org.scalatest.Transformer.apply(Transformer.scala:22)
        at org.scalatest.Transformer.apply(Transformer.scala:20)
        at org.scalatest.FunSuiteLike$$anon$1.apply(FunSuiteLike.scala:186)
        at org.scalatest.TestSuite.withFixture(TestSuite.scala:196)
        at org.scalatest.TestSuite.withFixture$(TestSuite.scala:195)
        at org.scalatest.FunSuite.withFixture(FunSuite.scala:1560)
        at org.scalatest.FunSuiteLike.invokeWithFixture$1(FunSuiteLike.scala:184)
        at org.scalatest.FunSuiteLike.$anonfun$runTest$1(FunSuiteLike.scala:196)
        at org.scalatest.SuperEngine.runTestImpl(Engine.scala:286)
        at org.scalatest.FunSuiteLike.runTest(FunSuiteLike.scala:196)
        at org.scalatest.FunSuiteLike.runTest$(FunSuiteLike.scala:178)
        at org.scalatest.FunSuite.runTest(FunSuite.scala:1560)
        at org.scalatest.FunSuiteLike.$anonfun$runTests$1(FunSuiteLike.scala:229)
        at org.scalatest.SuperEngine.$anonfun$runTestsInBranch$1(Engine.scala:393)
        at scala.collection.immutable.List.foreach(List.scala:392)
        at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:381)
        at org.scalatest.SuperEngine.runTestsInBranch(Engine.scala:376)
        at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:458)
        at org.scalatest.FunSuiteLike.runTests(FunSuiteLike.scala:229)
        at org.scalatest.FunSuiteLike.runTests$(FunSuiteLike.scala:228)
        at org.scalatest.FunSuite.runTests(FunSuite.scala:1560)
        at org.scalatest.Suite.run(Suite.scala:1124)
        at org.scalatest.Suite.run$(Suite.scala:1106)
        at org.scalatest.FunSuite.org$scalatest$FunSuiteLike$$super$run(FunSuite.scala:1560)
        at org.scalatest.FunSuiteLike.$anonfun$run$1(FunSuiteLike.scala:233)
        at org.scalatest.SuperEngine.runImpl(Engine.scala:518)
        at org.scalatest.FunSuiteLike.run(FunSuiteLike.scala:233)
        at org.scalatest.FunSuiteLike.run$(FunSuiteLike.scala:232)
        at ai.h2o.sparkling.DataSourceTestSuite.org$scalatest$BeforeAndAfterAll$$super$run(DataSourceTestSuite.scala:29)
        at org.scalatest.BeforeAndAfterAll.liftedTree1$1(BeforeAndAfterAll.scala:213)
        at org.scalatest.BeforeAndAfterAll.run(BeforeAndAfterAll.scala:210)
        at org.scalatest.BeforeAndAfterAll.run$(BeforeAndAfterAll.scala:208)
        at ai.h2o.sparkling.DataSourceTestSuite.run(DataSourceTestSuite.scala:29)

https://docs.gradle.org/6.5/dsl/org.gradle.api.tasks.testing.logging.TestLogging.html#org.gradle.api.tasks.testing.logging.TestLogging:showCauses