CLOUDSTACK-6371: Set snapshot size in copycommand answer during snapshot backup

(cherry picked from commit 295fa84d4d3bb100055d7124bb0d0d68491328fc)
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
CLOUDSTACK-6432: Blocking DHCP server to service DNS outside network

This would cover only DHCP only network since in basic and shared network, the
private IP used by VR and network may expose to outside.

(cherry picked from commit a554ebdf750be2ff2fd02fda38713b40313fcca8)
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Conflicts:
	server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java