HADOOP-15866. Renamed HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT keys break compatibility.

Contributed by Wei-Chiu Chuang.

(cherry picked from commit 52cb766ad0bbea378a529fcff3cf372cf0a33cde)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/CommonConfigurationKeysPublic.java

@@ -544,14 +544,29 @@ public class CommonConfigurationKeysPublic {
    */
   public static final String HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_KEY =
       "hadoop.security.groups.shell.command.timeout";
+  /**
+   * @deprecated use
+   * {@link CommonConfigurationKeysPublic#HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_KEY}
+   * instead.
+   */
+  public static final String HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_SECS =
+      HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_KEY;
   /**
    * @see
    * <a href="{@docRoot}/../hadoop-project-dist/hadoop-common/core-default.xml">
    * core-default.xml</a>
    */
   public static final long
-          HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_DEFAULT =
-          0L;
+      HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_DEFAULT =
+      0L;
+  /**
+   * @deprecated use
+   * {@link CommonConfigurationKeysPublic#HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_DEFAULT}
+   * instead.
+   */
+  public static final long
+      HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_SECS_DEFAULT =
+      HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_DEFAULT;
   /**
    * @see
    * <a href="{@docRoot}/../hadoop-project-dist/hadoop-common/core-default.xml">