Bug 1699 - FRM: Change data change listener scope from BASE to SUBTREE

* changed data change listener scope from BASE to SUBTREE

Change-Id: Ifbc161c2c709157d5665fae9e49059477053ff82
Signed-off-by: Jan Hajnar <jhajnar@cisco.com>
Merge "Bug 1699 - FRM: Change data change listener scope from BASE to SUBTREE"