update scala-reflect dependency on core, as in the newer version of jackson scala module it is not transitive.

Author: ScrapCodes

core/pom.xml

@@ -224,6 +224,10 @@
       <groupId>org.scala-lang</groupId>
       <artifactId>scala-library</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.scala-lang</groupId>
+      <artifactId>scala-reflect</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.json4s</groupId>
       <artifactId>json4s-jackson_${scala.binary.version}</artifactId>

project/SparkBuild.scala

@@ -553,7 +553,7 @@ object DependencyOverrides {
   lazy val settings = Seq(
     dependencyOverrides += "com.google.guava" % "guava" % "14.0.1",
     dependencyOverrides += "commons-io" % "commons-io" % "2.4",
-    dependencyOverrides += "com.fasterxml.jackson.core"  % "jackson-databind" % "2.6.7.3",
+    dependencyOverrides += "com.fasterxml.jackson.core"  % "jackson-databind" % "2.9.10.5",
     dependencyOverrides += "jline" % "jline" % "2.14.6")
 }