[SPARK-4409] Organized imports

Author: brkyvz

mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala

@@ -17,11 +17,12 @@
 
 package org.apache.spark.mllib.linalg
 
-import breeze.linalg.{Matrix => BM, DenseMatrix => BDM, CSCMatrix => BSM}
+import java.util.{Arrays, Random}
 
-import java.util.{Random, Arrays}
 import scala.collection.mutable.ArrayBuffer
 
+import breeze.linalg.{CSCMatrix => BSM, DenseMatrix => BDM, Matrix => BM}
+
 /**
  * Trait for a local matrix.
  */