Tests added for multiple data tree analysis

**this commit is for analysis purposes only, not for merge
- add unit test for gson JSONreader
- add unit test for ODL JsonParserStream

Issue-ID: CPS-1286
Signed-off-by: emaclee <lee.anjella.macabuhay@est.tech>
Change-Id: Ia4a8c3e36f83b4cd857b4ff20f6a37e418ffd2ec
4 files changed