Schema changes to support network-policy in src/dest fields of a policy

Change-Id: I09c54a04789bd63c5ec13b529813e2e2a89cb37b
(cherry picked from commit eea78ae958c0a3c9d26fd5c95c3d47ae42ce0fe5)
Merge "Schema changes to support network-policy in src/dest fields of a policy" into R1.10