Added parameterless BusAttachment.Connect and ConnectSpec property

Unit test added to Test the parameterless BusAttachment.Connect.  The unit test
uses the ConnectSpec property.

Change-Id: I9e8941c9b8ae275a545aae4386faab9c0f92b8cd
Unit tests added to verify AuthListener in the Unity Bindings

Additional Constructor for BusObject that can construct a BusObject by simply
passing the object path.

Some minor white space changes

Change-Id: I337a29f837529f52c5a646e2dca7ae0faea05be2