SPARK-2749 [BUILD] Part 2. Fix a follow-on scalastyle error

The test compile error is fixed, but the build still fails because of one scalastyle error.

https://amplab.cs.berkeley.edu/jenkins/view/Spark/job/Spark-Master-Maven-pre-YARN/lastFailedBuild/hadoop.version=1.0.4,label=centos/console

Author: Sean Owen <srowen@gmail.com>

Closes apache#1690 from srowen/SPARK-2749 and squashes the following commits:

1c9e7a6 [Sean Owen] Also: fix scalastyle error by wrapping a long line

tools/src/main/scala/org/apache/spark/tools/GenerateMIMAIgnore.scala

@@ -114,9 +114,10 @@ object GenerateMIMAIgnore {
 
   private def getAnnotatedOrPackagePrivateMembers(classSymbol: unv.ClassSymbol) = {
     classSymbol.typeSignature.members.filterNot(x =>
-      x.fullName.startsWith("java") || x.fullName.startsWith("scala"))
-        .filter(x => isPackagePrivate(x) || isDeveloperApi(x) || isExperimental(x)).map(_.fullName) ++
-      getInnerFunctions(classSymbol)
+      x.fullName.startsWith("java") || x.fullName.startsWith("scala")
+    ).filter(x =>
+      isPackagePrivate(x) || isDeveloperApi(x) || isExperimental(x)
+    ).map(_.fullName) ++ getInnerFunctions(classSymbol)
   }
 
   def main(args: Array[String]) {