[show][muxcable] fix the sudo access error for show muxcable metrics (sonic-net#2083)

This change is required for such behavior with the command below, which works okay if you try with sudo

How to verify it
with the change, no need for sudo, tested on an arista 7050cx3 lab device

vdahiya@sonic:~$ show mux metrics Ethernet0
PORT       EVENT                         TIME
---------  ----------------------------  ---------------------------
Ethernet0  linkmgrd_switch_active_start  2022-Feb-28 18:49:59.350302
Ethernet0  xcvrd_switch_active_start     2022-Feb-28 18:49:59.354076
Ethernet0  xcvrd_switch_active_end       2022-Feb-28 18:49:59.357925
Ethernet0  linkmgrd_switch_active_end    2022-Feb-28 18:49:59.35919

Signed-off-by: vaibhav-dahiya <[email protected]>

Author: vdahiya12

show/muxcable.py

@@ -1068,7 +1068,7 @@ def metrics(db, port, json_output):
     for namespace in namespaces:
         asic_id = multi_asic.get_asic_index_from_namespace(namespace)
         # replace these with correct macros
-        per_npu_statedb[asic_id] = swsscommon.SonicV2Connector(use_unix_socket_path=True, namespace=namespace)
+        per_npu_statedb[asic_id] = swsscommon.SonicV2Connector(use_unix_socket_path=False, namespace=namespace)
         per_npu_statedb[asic_id].connect(per_npu_statedb[asic_id].STATE_DB)
 
         metrics_table_keys[asic_id] = per_npu_statedb[asic_id].keys(