Bug 1443: Added support for misplaced augmentations.

Binding Specification reuses elements inside groupings
as part of normal data tree. Augmentations and augmented
cases could be copied by user using copy builders
and may be used at incorrect place, where augmentation
with same data is present.

Binding Data Codec will treat this augmentations as
same, if augmentation definining same data subtree
is present at real location.

Change-Id: Ie232ef9b5e5bbe84f5562bfce612d8ea03b9a9a5
Signed-off-by: Tony Tkacik <ttkacik@cisco.com>
Merge "Bug 1443: Added support for misplaced augmentations."