tablet-leader command to check current Raft leader

Change-Id: Id360db21988a50c3e2895c5194d59b0ba4cb49e4
diff --git a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
index 71ce11a..b725bcb 100644
--- a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -27,6 +27,11 @@
         <command>
             <action class="org.onlab.onos.cli.TabletMemberCommand"/>
         </command>
+
+        <command>
+            <action class="org.onlab.onos.cli.TabletLeaderCommand"/>
+        </command>
+
         <command>
             <action class="org.onlab.onos.cli.TabletAddCommand"/>
             <completers>