Also add staging repo to SBT.

Author: JoshRosen

project/SparkBuild.scala

@@ -161,7 +161,8 @@ object SparkBuild extends PomBuild {
     resolvers := Seq(
       DefaultMavenRepository,
       Resolver.mavenLocal,
-      Resolver.file("local", file(Path.userHome.absolutePath + "/.ivy2/local"))(Resolver.ivyStylePatterns)
+      Resolver.file("local", file(Path.userHome.absolutePath + "/.ivy2/local"))(Resolver.ivyStylePatterns),
+      "Spark Hive Staging Repository" at "https://oss.sonatype.org/content/repositories/orgspark-project-1122"
     ),
     externalResolvers := resolvers.value,
     otherResolvers <<= SbtPomKeys.mvnLocalRepository(dotM2 => Seq(Resolver.file("dotM2", dotM2))),