HADOOP-11186: documentation should talk about hadoop.htrace.spanreceiver.classes, not hadoop.trace.spanreceiver.classes (cmccabe)

(cherry picked from commit c2575fb046bb8fab73ee9c55e0ce65d4d0df75d0)

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -30,6 +30,9 @@ Release 2.7.0 - UNRELEASED
     HDFS-7227. Fix findbugs warning about NP_DEREFERENCE_OF_READLINE_VALUE in
     SpanReceiverHost (cmccabe)
 
+    HADOOP-11186. documentation should talk about
+    hadoop.htrace.spanreceiver.classes, not hadoop.trace.spanreceiver.classes (cmccabe)
+
 Release 2.6.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/site/apt/Tracing.apt.vm

@@ -42,7 +42,7 @@ public void receiveSpan(Span span);
   Configure what SpanReceivers you'd like to use
   by putting a comma separated list of the fully-qualified class name of
   classes implementing SpanReceiver
-  in <<<hdfs-site.xml>>> property: <<<hadoop.trace.spanreceiver.classes>>>.
+  in <<<hdfs-site.xml>>> property: <<<hadoop.htrace.spanreceiver.classes>>>.
 
 +----
   <property>