add dbus interface for modbus inventory source

The modbus detect service will probe the modbus to detect devices using
the configuration supplied via ModbusDetectDevice interface. In return,
it will

add dbus interface for modbus inventory source

The modbus detect service will probe the modbus to detect devices using
the configuration supplied via ModbusDetectDevice interface. In return,
it will generate this Dbus interface to publish inventory information
for discovered modbus devices of that type.

Change-Id: I786b820babe9bed108e13f752a99c0756edc2038
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>

show more ...