[HOTFIX]: Java 6 Build Breaks

These were blocking RC1 so I fixed them manually.

core/src/test/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleWriterSuite.java

@@ -252,20 +252,6 @@ public class UnsafeShuffleWriterSuite {
     createWriter(false).stop(false);
   }
 
-  @Test
-  public void writeEmptyIterator() throws Exception {
-    final UnsafeShuffleWriter<Object, Object> writer = createWriter(true);
-    writer.write(Collections.<Product2<Object, Object>>emptyIterator());
-    final Option<MapStatus> mapStatus = writer.stop(true);
-    assertTrue(mapStatus.isDefined());
-    assertTrue(mergedOutputFile.exists());
-    assertArrayEquals(new long[NUM_PARTITITONS], partitionSizesInMergedFile);
-    assertEquals(0, taskMetrics.shuffleWriteMetrics().get().shuffleRecordsWritten());
-    assertEquals(0, taskMetrics.shuffleWriteMetrics().get().shuffleBytesWritten());
-    assertEquals(0, taskMetrics.diskBytesSpilled());
-    assertEquals(0, taskMetrics.memoryBytesSpilled());
-  }
-
   @Test
   public void writeWithoutSpilling() throws Exception {
     // In this example, each partition should have exactly one record:

sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcRelation.scala

@@ -17,8 +17,9 @@
 
 package org.apache.spark.sql.hive.orc
 
-import java.util.{Objects, Properties}
+import java.util.Properties
 
+import com.google.common.base.Objects
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.{FileStatus, Path}
 import org.apache.hadoop.hive.conf.HiveConf.ConfVars