Get minigraph facts from DUT instead of local

Author: Sihui Han

ansible/roles/test/tasks/interface.yml

@@ -1,7 +1,5 @@
 - name: Gather minigraph facts about the device
   minigraph_facts: host={{inventory_hostname}}
-  become: no
-  connection: local
 
 - name: Get interface facts
   interface_facts: up_ports={{minigraph_ports}}