AMBARI-9305 AMS: certain metric charts look incorrect (additional patch) (dsen)

ambari-metrics/ambari-metrics-common/src/test/java/org/apache/hadoop/metrics2/sink/timeline/cache/TimelineMetricsCacheTest.java

@@ -17,8 +17,6 @@
  */
 package org.apache.hadoop.metrics2.sink.timeline.cache;
 
-import static com.sun.tools.javac.util.Assert.assertEquals;
-
 import org.apache.hadoop.metrics2.MetricType;
 import org.apache.hadoop.metrics2.sink.timeline.TimelineMetric;
 import org.junit.Test;
@@ -26,6 +24,8 @@ import org.junit.Test;
 import java.util.Map;
 import java.util.TreeMap;
 
+import static org.junit.Assert.assertEquals;
+
 public class TimelineMetricsCacheTest {
 
   private static final long DEFAULT_START_TIME = 1411023766;