Update Ambari website. Remove 2.6.x versions from what's new. (#2192)

docs/src/site/apt/whats-new.apt

@@ -54,17 +54,6 @@ What's New with Ambari?
 
     * Made it easer to setup SSO for Ambari, Atlas, and Ranger.
 
-  * Ambari 2.6.2 added the following features:
-
-    * Protecting Zeppelin Notebook SSL credentials
-
-    * Setting appropriate HTTP headers for using Cloud Object Stores with HDP
-
-  * Ambari 2.6.1 added the following feature:
-
-    * Conditionally Install LZO packages through Ambari (AMBARI-22457)
-
-
 Getting Ambari Source
 
   See {{{https://cwiki.apache.org/confluence/display/AMBARI/Ambari+Development} Ambari Development guide}} on how to check out the source and build it.

docs/src/site/site.xml

@@ -147,6 +147,7 @@
     </menu>
 
     <menu name="Releases">
+      <item name="2.7.1" href="http://www.apache.org/dyn/closer.cgi/ambari/ambari-2.7.1"/>
       <item name="2.7.0" href="http://www.apache.org/dyn/closer.cgi/ambari/ambari-2.7.0"/>
       <item name="2.6.2" href="http://www.apache.org/dyn/closer.cgi/ambari/ambari-2.6.2"/>
       <item name="2.6.1" href="http://www.apache.org/dyn/closer.cgi/ambari/ambari-2.6.1"/>