Fixed various small bugs when testing stateful07 version.
- srp & lsp serializers assumed all flags are present
- missing augmentation of lsp in add-lsp operation

Change-Id: I945fe7adf5f3352760dda8936c74642de91f7f94
Signed-off-by: Dana Kutenicsova <dkutenic@cisco.com>
(cherry picked from commit 57287d4c74fb74b33e93e69dd956217b853abc24)
Merge "Fixed various small bugs when testing stateful07 version. - srp & lsp serializers assumed all flags are present - missing augmentation of lsp in add-lsp operation" into stable/hydrogen