[sophia][network] rename gw-ng to sw-2 + update port description

input/grid5000/sites/sophia/networks/gw-ng.yaml

----
-gw-ng:
-  model: Aruba 6300M
-  warranty: 2048-05
-  kind: switch
-  managed_by_us: true
-  site: sophia
-  ip: 172.17.143.253
-  snmp_community: public
-  linecards:
-    1:
-      snmp_pattern: "%LINECARD%/1/%PORT%"
-      kavlan_pattern: "%LINECARD%/1/%PORT%"
-      rate: 1000000000
-      kind: node
-      ports:
-        36:
-          uid: esterel41-1
-        47:
-          uid: sw-3
-          kind: switch
-        48:
-          uid: gw
-          kind: router
-  channels:
-    lag1:
-      kind: server
-      rate: 500000000000
-      uid: srv-data1
-      port: lag1
-    lag2:
-      kind: server
-      rate: 500000000000
-      uid: srv-data2
-      port: lag2
-    lag3:
-      kind: server
-      rate: 500000000000
-      uid: srv-data3
-      port: lag3
-    lag4:
-      kind: server
-      rate: 200000000000
-      uid: srv-data4
-      port: lag4

input/grid5000/sites/sophia/networks/sw-2.yaml

+---
+sw-2:
+  model: Aruba 6300M
+  warranty: 2048-05
+  kind: switch
+  managed_by_us: true
+  site: sophia
+  ip: 172.17.143.253
+  snmp_community: public
+  linecards:
+    1:
+      snmp_pattern: "%LINECARD%/1/%PORT%"
+      kavlan_pattern: "%LINECARD%/1/%PORT%"
+      rate: 1000000000
+      kind: node
+      ports:
+        1:
+          uid: pve-2-bmc
+          kind: other
+        2:
+          uid: pve-1-bmc
+          kind: other
+        3:
+          uid: srv-data4-bmc
+          kind: other
+        4:
+          uid: srv-data2-bmc
+          kind: other
+        5:
+          uid: srv-data1-bmc
+          kind: other
+        6: 
+          uid: srv-scrath-1-bmc
+          kind: other
+        7: 
+          uid: srv-scrath-2-bmc
+          kind: other
+        8: 
+          uid: srv-scrath-3-bmc
+          kind: other
+        10:
+          uid: pve-dmz-south-1-bmc
+          kind: other
+        11:
+          uid: srv3-bmc
+          kind: other
+        12:
+          uid: gwol-south-bmc
+          kind: other
+        27:
+          uid: srv-data
+          kind: server
+        36:
+          uid: esterel41-1
+        40:
+          uid: swadmin-2
+          kind: switch
+        46:
+          uid: swadmin-3
+          kind: switch
\ No newline at end of file