[unifi] Deploy Unifi controller to the unifi group

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

hosts

@@ -215,6 +215,9 @@ eclat.adm.crans.org
 gulp.cachan-adm.crans.org
 tealc.adm.crans.org
 
+[unifi]
+unifi.cachan-adm.crans.org
+
 [slapd]
 tealc.adm.crans.org
 sam.adm.crans.org

plays/unifi.yml

 #!/usr/bin/env ansible-playbook
 ---
 # Deploy Unifi Controller
-- hosts: unifi.adm.crans.org
+- hosts: unifi
   roles:
     - unifi-controller