[testbed]: Remove connection local for port_alias module

Author: Shu0T1an ChenG

ansible/config_sonic_basedon_testbed.yml

@@ -66,7 +66,6 @@
 
   - name: find interface name mapping and individual interface speed if defined
     port_alias: hwsku="{{ hwsku }}"
-    connection: local
 
   - name: find all enabled host_interfaces
     set_fact:

ansible/roles/fanout/tasks/fanout_sonic.yml

@@ -2,7 +2,6 @@
 
 - name: find interface name mapping
   port_alias: hwsku="{{ device_info["HwSku"] }}"
-  connection: local
 
 - name: prepare fanout switch admin login info
   set_fact: ansible_user={{ fanout_sonic_user }} ansible_password={{ fanout_sonic_password }}