Remove NotNull on revision for YangResourceEntity

Issue-ID: CPS-1265
Signed-off-by: lukegleeson <luke.gleeson@est.tech>
Change-Id: Icfe4d9881a3aa7d92d5bd17eaaed91bdbce0a203
(cherry picked from commit 8c6b5627652a4f3b4926b8c425e4c1036ac1e570)
1 file changed