HDFS-13538. HDFS DiskChecker should handle disk full situation

Author: Aswin M Prabhu

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestDiskCheckerWithDiskIo.java

@@ -31,7 +31,9 @@
 import java.nio.file.attribute.PosixFilePermissions;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 
 
 /**