Dev/fix port size (#805)

* port datatype changing from int to uint16_t
* throwing for -1 given for uint16_t ports

slsSupportLib/tests/test-network_utils.cpp

@@ -115,7 +115,7 @@ TEST_CASE("Copy construct a MacAddr") {
 }
 
 TEST_CASE("udp dst struct basic properties") {
-    static_assert(sizeof(UdpDestination) == 36,
+    static_assert(sizeof(UdpDestination) == 32,
                   "udpDestination struct size does not match");
     UdpDestination dst{};
     REQUIRE(dst.entry == 0);