Renaming 'exp' to 'incubator'.

Change-Id: I184f756b463dce31634410f4f3bf180cbe6c8adb
diff --git a/docs/external.xml b/docs/external.xml
index db56c76..e3618dd 100644
--- a/docs/external.xml
+++ b/docs/external.xml
@@ -68,7 +68,7 @@
                         <group>
                             <title>Incubator for Network Model &amp; Services</title>
                             <packages>
-                                org.onosproject.exp:org.onosproject.exp.*
+                                org.onosproject.exp:org.onosproject.incubator.*
                             </packages>
                         </group>
                     </groups>