docs for portchannel db config

Author: Anton

doc/Configuration.md

@@ -1139,21 +1139,25 @@ name as object key and member list as attribute.
 ```
 {
 "PORTCHANNEL": {
-        "PortChannel0003": {
-                "admin_status": "up",
-        "min_links": "1",
+    "PortChannel0003": {
+        "admin_status": "up",
+        "mtu": "9100",
+        "lacp_key": "auto",
+        "lacp_rate": "fast",
         "members": [
             "Ethernet54"
-        ],
-        "mtu": "9100"
+        ]
     },
     "PortChannel0004": {
         "admin_status": "up",
-        "min_links": "1",
+        "mtu": "9100",
+        "lacp_key": "auto",
+        "lacp_rate": "fast",
         "members": [
             "Ethernet56"
         ],
-        "mtu": "9100"
+        "min_links": "1",
+        "fallback": "true"
     }
   }
 }