edbus: Use eina_log in client example and generalize expected values

edbus: Use eina_log in client example and generalize expected values

Keep expected values in a struct. It would be ideal to have all values
and compare functions in an array, so we would be able to set the same
callback function for all methods. But it's already short enough so keep
it as is.

The usage of eina_log here allows us to easily catch which test failed.

SVN revision: 81173