Bug 1418 - onDataChange notification is not returning any data to

Bug 1418 - onDataChange notification is not returning any data to
the getCreatedData and getModifiedData function calls. Data change
notification does not seem to work.

* Changed normalized to binding data change event translation call to
include event listener path. This path is then used to decode leaf or
mixin only augmentation because it can't be injected through children.
* Added verification tests.

Change-Id: Ia9d936f17b30b94fe4878e343cff7babb8d29d0f
Signed-off-by: Jan Hajnar <jhajnar@cisco.com>