test: use mocked sdbus interface for sdbusplus

Use mocked sdbus interface for sdbusplus such that it doesn't require
talking to the real dbus interfaces.

The warnings for the unexpected calls on the sdbus interface can be
ignored in the cases for this test as returning 0 is the desired
behavior.  The warnings can be trivially handled by expecting the calls,
or setting up "ON_CALL" statements.

Change-Id: I8c72eaec957fb6a68eeaac982c1f45998487c35f
Signed-off-by: Patrick Venture <venture@google.com>
1 file changed