Switch main instance in inventory

Change-Id: If93ca74b1d11b4e4c76de0e5a4bbfbb546301563
diff --git a/inventory b/inventory
index 3e55d16..6873aec 100644
--- a/inventory
+++ b/inventory
@@ -11,10 +11,10 @@
 worker-08  ansible_host=10.0.10.60
 
 [main]
-head-01
+head-02
 
 [test]
-head-02
+head-01
 
 [krawfish]
 worker-05
@@ -33,8 +33,8 @@
 external_image="korap/kalamar-plugin-externalresources:latest"
 
 [main:vars]
-external_path="/opt/korap/instance-main/Plugin-External"
+external_path="/opt/korap/instance-main/Kalamar-External"
 external_container_name="kalamar-plugin-externalresources-main"
 external_indexer_name="kalamar-plugin-externalresources-index-main"
-external_port="5723:5722"
+external_port="5722:5722"
 external_image="korap/kalamar-plugin-externalresources:latest"