of: plugin-manager: copy properties for adding/updating

of: plugin-manager: copy properties for adding/updating

Create copied version of properties before updating or
adding in target node as this is permanently used by
target node.

Change-Id: I1831391097baaae8b345725180b71fe238960b75
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/817450
(cherry picked from commit 756d0ccd51f1f98b45766963c87094d91cf99a45)
Reviewed-on: http://git-master/r/842357
GVS: Gerrit_Virtual_Submit
Reviewed-by: Shreshtha Sahu <ssahu@nvidia.com>
Tested-by: Shreshtha Sahu <ssahu@nvidia.com>