vlan: implement delete interface

Delete the in-memory vlan object,Also
deletes the associated device file and the
network file.

Change-Id: I613e31aaa4fa9172c6226765ac044481ffbd88ec
Signed-off-by: Ratan Gupta <ratagupt@in.ibm.com>
diff --git a/types.hpp b/types.hpp
index ca35421..eb1f9fe 100644
--- a/types.hpp
+++ b/types.hpp
@@ -12,6 +12,17 @@
 {
 namespace network
 {
+namespace systemd
+{
+namespace config
+{
+
+constexpr auto networkFilePrefix = "00-bmc-";
+constexpr auto networkFileSuffix = ".network";
+constexpr auto deviceFileSuffix = ".netdev";
+
+}// namespace config
+}// namespace systemd
 
 using IntfName = std::string;