control: Handle updating service states

Add the necessary functions to handle updating the cached services tree
with the service names and owner states for any give path and interface.
A future commit is going to shift the manager's service handling
functions away from being static once all the required objects get an
ability to retrieve their associated manager object.

Change-Id: I6d1c80c3eeaffa6c38d527680454fd98432e8e03
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
2 files changed