HADOOP-18068. final typos

Change-Id: I1809cec29d9354185d759e24e65688a44d50cb89

Author: steveloughran

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/audit/impl/ActiveAuditManagerS3A.java

@@ -119,7 +119,7 @@ public final class ActiveAuditManagerS3A
       = "Span attached to request is not a wrapped span";
 
   /**
-   * Arbritary threshold for triggering pruning on deactivation.
+   * Arbitrary threshold for triggering pruning on deactivation.
    * High enough it doesn't happen very often, low enough
    * that it will happen regularly on a busy system.
    * Value: {@value}.

hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/audit/impl/TestActiveAuditManagerThreadLeakage.java

@@ -138,7 +138,7 @@ public void testMemoryLeak() throws Throwable {
     LOG.info("Total prune count {}", pruneCount);
 
     Assertions.assertThat(pruneCount)
-        .describedAs("Totel prune count")
+        .describedAs("Total prune count")
         .isNotZero();
 
     // now count number of audit managers GC'd