control: Use getSubTreeRaw call in addServices

In cases where a property used by an action isn't on D-Bus on startup,
the original getSubTree() call would throw an unhandled exception which
would crash the daemon.  Change to getSubTreeRaw() so that doesn't
happen.

Also change a trace that a occurs when a D-Bus service isn't found to
debug as that is expected in this case.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: Ibd147c303d40761f75f961a9ce404139c2b2c134
1 file changed