added ip checksum inserter + added generics to eth_tester for setting

the header length

Closes HPR-127

applications/rdma_demo/src/vhdl/rdma_demo_eth_tester_wrapper.vhd

@@ -189,10 +189,11 @@ begin
   generic map (
     g_nof_octet_generate => c_rdma_demo_nof_octet_generate_100gbe,
     g_nof_octet_output   => c_rdma_demo_nof_octet_output_100gbe,
-    g_use_network_header => false,
+    g_use_eth_header     => false,
+    g_use_ip_udp_header  => false,
     g_use_dp_header      => true,
-    g_hdr_field_arr      => c_rdma_demo_hdr_field_arr,
-    g_hdr_field_sel      => c_rdma_demo_hdr_field_sel,
+    g_hdr_field_arr      => c_rdma_demo_dp_hdr_field_arr,
+    g_hdr_field_sel      => c_rdma_demo_dp_hdr_field_sel,
     g_remove_crc         => false
   )
   port map (