Added support of skipping JDK check with scalatest.skip.jdk.check java property.
Added support of skipping JDK check with scalatest.skip.jdk.check java property.

dotty-staging/scalatest,dotty-staging/scalatest,scalatest/scalatest,scalatest/scalatest,cheeseng/scalatest,scalatest/scalatest,cheeseng/scalatest,dotty-staging/scalatest,cheeseng/scalatest