Merge pull request #1297 from datastax/SPARKC-637-b2.5

SPARKC-637 upgrade java driver to 4.9.0

Author: jtgrabowski

project/Versions.scala

@@ -5,7 +5,7 @@ object Versions {
   val CommonsLang3    = "3.5"
   val Paranamer       = "2.8"
 
-  val DataStaxJavaDriver = "4.7.2"
+  val DataStaxJavaDriver = "4.9.0"
 
   val ScalaCheck      = "1.14.0"
   val ScalaTest       = "3.0.8"