Bug 1573: Fixed deserialization of not representable Instance Identifier
Not all YangInstanceIdentifier are representable in Binding form,
codecs were designed to handle this and omit such cases,
but one ommision case was missing in deserializing Instance Identifier
without data and this resulted into returning incorrectly
constructed InstanceIdentifier.
Updated test which was testing incorrect behaviour to test correct
behaviour.
Change-Id: I97215f674f7ff164bc2c87d9eef4a254510b0280
Signed-off-by: Tony Tkacik <ttkacik@cisco.com>