TT#28100 Reverted partially bea5a7b1e: enable port 8088 check (InfluxDb Backup/Restore RPC)

On newly installed CE/PRO-mr6.5/trunk the port is listened by InfluxDb.
Restored it into system tests and sent ping to Guillem for rechecking
(he is not available right now, while the test is failing and
prevent building new vagrant images).

Change-Id: I432bc9540525cf11ed343064287840a62f0f44d3

templates/821_network-ports-ngcp.yaml.tt2

@@ -180,5 +180,5 @@ port:
 
   # InfluxDb Backup/Restore RPC
   tcp:8088:
-    listening: false
+    listening: true
     ip: ["127.0.0.1"]