Merge changes I97ba5903,Icd80b368 into rvc-dev

* changes:
  Make VpnProfile.maxMtu default value match Ikev2VpnProfile
  Add negotiated DNS servers to VPN config
tree: 784c1d80dc0983d24e2809d4144c21d1d4aa4bc2
  1. core/
  2. services/
  3. tests/