AMBARI-5299. Updated ganglia service description (dlysnichenko)

ambari-server/src/main/resources/stacks/HDP/1.3.2/services/GANGLIA/metainfo.xml

@@ -20,7 +20,7 @@
   <services>
     <service>
       <name>GANGLIA</name>
-      <comment>Ganglia Metrics Collection system</comment>
+      <comment>Ganglia Metrics Collection system (&lt;a href=&quot;http://oss.oetiker.ch/rrdtool/&quot; target=&quot;_blank&quot;&gt;RRDTool&lt;/a&gt; will be installed too)</comment>
       <version>3.5.0</version>
       <components>
         <component>

ambari-server/src/main/resources/stacks/HDP/2.0.6/services/GANGLIA/metainfo.xml

@@ -20,7 +20,7 @@
   <services>
     <service>
       <name>GANGLIA</name>
-      <comment>Ganglia Metrics Collection system</comment>
+      <comment>Ganglia Metrics Collection system (&lt;a href=&quot;http://oss.oetiker.ch/rrdtool/&quot; target=&quot;_blank&quot;&gt;RRDTool&lt;/a&gt; will be installed too)</comment>
       <version>3.5.0</version>
       <components>
         <component>