vlan:Remove the multiple implementation of sdbusplus object

This commit removes the multiple implementation of sdbus server
object from vlan_interface class,Due to this mapper doesn't recieve
the interface remove signal which leads to showing the dbus object
which is not there.
This commit also fixes the order of claiming the bus name.

Resolves openbmc/openbmc#2150
Resolves openbmc/openbmc#2152
Resolves openbmc/openbmc#2185

Change-Id: I00b0e9d70abbe1073d20fb0d0e2d8a9ef0300c31
Signed-off-by: Ratan Gupta <ratagupt@in.ibm.com>
3 files changed