VOL-1570 Omit some fields from voltha CLI devices command

Change-Id: Id5702d8fb038e94d3616d6dc45d888dcc887ea85
diff --git a/python/cli/main.py b/python/cli/main.py
index 0f5c618..41e04e8 100755
--- a/python/cli/main.py
+++ b/python/cli/main.py
@@ -225,7 +225,11 @@
             'hardware_version',
             'images',
             'firmware_version',
-            'vendor_id'
+            'vendor_id',
+            'flows',
+            'pm_configs',
+            'proxy_address',
+            'ports'
         }
         print_pb_list_as_table('Devices:', devices, omit_fields, self.poutput)