AMBARI-3183. Set JournalNode as MASTER in stack.

ambari-server/src/main/resources/stacks/HDP/2.0.5/services/HDFS/metainfo.xml

@@ -43,7 +43,7 @@
         
         <component>
             <name>JOURNALNODE</name>
-            <category>SLAVE</category>
+            <category>MASTER</category>
         </component>
 
         <component>

ambari-server/src/test/resources/stacks/HDP/2.0.5/services/HDFS/metainfo.xml

@@ -43,7 +43,7 @@
         
         <component>
             <name>JOURNALNODE</name>
-            <category>SLAVE</category>
+            <category>MASTER</category>
         </component>
 
         <component>