Update notify method to update interfaces
Update notify method to update interfaces

When interfaces already exist, update them on notify.

Signed-off-by: Brad Bishop <713d098c0be4c8fd2bf36a94cd08699466677ecd@fuzziesquirrel.com>
Change-Id: Iac75b59ed51320b932ff4fe4eab0ed576cef6c7a

openbmc/phosphor-inventory-manager,openbmc/phosphor-inventory-manager