Node API - GET Method performance issue

- Modified toDataNode call based on fetch descendants option.
- Used fragment extract to build fragment entity.
- Modified data set to have correct parent id for descendants.

Reviewers : Toine, Priyank and Joe

Issue-ID: CPS-1171
Signed-off-by: sourabh_sourabh <sourabh.sourabh@est.tech>
Change-Id: I27a537fe72dd396722e6cfde7d8c454ed2579ec0
Signed-off-by: sourabh_sourabh <sourabh.sourabh@est.tech>
4 files changed