Revert "Fix fast-reboot-dump.py SonicV2Connector after late merge (#1546

)" (#1561)

- What I did
It seems like this change is not backported to 202012: #1392
So this PR #1546 Is not required on 202012 branch.
It was cherry-picked to 202012 and now the fast-reboot-dump script is broken.

- How I did it
Revert the commit.

- How to verify it
Run fast-reboot on 202012 branch.

scripts/fast-reboot-dump.py

@@ -190,8 +190,8 @@ def get_fdb(db, vlan_name, vlan_id, bridge_id_2_iface):
     return fdb_entries, available_macs, map_mac_ip
 
 def generate_fdb_entries(filename):
-    asic_db = SonicV2Connector(use_unix_socket_path=False)
-    app_db = SonicV2Connector(use_unix_socket_path=False)
+    asic_db = swsssdk.SonicV2Connector(host='127.0.0.1')
+    app_db = swsssdk.SonicV2Connector(host='127.0.0.1')
     asic_db.connect(asic_db.ASIC_DB, False)   # Make one attempt only
     app_db.connect(app_db.APPL_DB, False)   # Make one attempt only