Bug 865: Fixed use of removed deprecated YANGInstanceIdentifier methods.

Some components in controller still used methods which was deprecated
before Helium and was removed after Helium was released to accomodate
API changes for 0.7.0 Yangtools. This patch migrates code to replacement
methods.

Change-Id: Ia7ef044eb3af4f5652dc71d9cba2bb64efd95187
Signed-off-by: Tony Tkacik <ttkacik@cisco.com>
Merge "Bug 865: Fixed use of removed deprecated YANGInstanceIdentifier methods."