Ports with zero counters displayed on UI

Currently PortView UI shows the message: "No ports found" in 2 cases:
(i)  The device connected to ONOS has no ports (the right case).
(ii) The device connected to ONOS has one or more ports, but zero packet
statistics (i.e., sent/received/dropped bytes/packets etc).

In the latter case, the message shown in the UI is misleading because one
might think that there are no ports detected on the device.
This patch solves this problem at the cost of showning every port.

Change-Id: I2e7a1b60e0def953f338bef28b130219f4536001
Signed-off-by: Georgios Katsikas <katsikas.gp@gmail.com>
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/PortViewMessageHandler.java b/web/gui/src/main/java/org/onosproject/ui/impl/PortViewMessageHandler.java
index 205be39..e0af5c9 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/PortViewMessageHandler.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/PortViewMessageHandler.java
@@ -125,9 +125,6 @@
                         ds.getPortDeltaStatistics(deviceId) :
                         ds.getPortStatistics(deviceId);
                 for (PortStatistics stat : stats) {
-                    if (nz && stat.isZero()) {
-                        continue;
-                    }
                     populateRow(tm.addRow(), stat);
                 }
             }