HDFS-8523. Remove usage information on unsupported operation 'fsck -showprogress' from branch-2 (Contributed by J.Andreina)

(cherry picked from commit 0ed9c2d8fec93b5dac9c305eda272ad8dfd869a9)

Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -102,6 +102,9 @@ Release 2.7.1 - UNRELEASED
     HDFS-8270. create() always retried with hardcoded timeout when file already
     exists with open lease (J.Andreina via vinayakumarb)
 
+    HDFS-8523. Remove usage information on unsupported operation
+    "fsck -showprogress" from branch-2 (J.Andreina via vinayakumarb)
+
 Release 2.7.0 - 2015-04-20
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md

@@ -1,4 +1,4 @@
-<!---
+<!---
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at
@@ -100,7 +100,7 @@ Usage:
               [-list-corruptfileblocks |
               [-move | -delete | -openforwrite]
               [-files [-blocks [-locations | -racks]]]
-              [-includeSnapshots] [-showprogress]
+              [-includeSnapshots]
 
 | COMMAND\_OPTION | Description |
 |:---- |:---- |
@@ -114,7 +114,6 @@ Usage:
 | `-list-corruptfileblocks` | Print out list of missing blocks and files they belong to. |
 | `-move` | Move corrupted files to /lost+found. |
 | `-openforwrite` | Print out files opened for write. |
-| `-showprogress` | Print out dots for progress in output. Default is OFF (no progress). |
 
 Runs the HDFS filesystem checking utility. See [fsck](./HdfsUserGuide.html#fsck) for more info.