Upgrade Open daylight yang tool to version 8.0.6

- changed classes according to upgrade of yang tool
- changed methods in YangUtils class to accomodate change for
  jSonParserStream method
- updated unit tests for the upgrade

Signed-off-by: emaclee <lee.anjella.macabuhay@est.tech>
Change-Id: Ib62fe424150ed0695eed168e1ae21f4d9a61cdf4
8 files changed