We should increment the increment when we continue (sonic-net#12)

Author: vasant17

orchagent/portsorch.cpp

@@ -2145,6 +2145,7 @@ void PortsOrch::doPortTask(Consumer &consumer)
             {
                 // Port has one or more dependencies, cannot remove
                 SWSS_LOG_WARN("Cannot to remove port because of dependency"); 
+                it++;
                 continue;
             }