Specify network pool as address/mask

Change-Id: Ib987434e04810be11b5a95b58605e2533aaa0417
Use pooled network for SNAT rule

Change-Id: I16376ecec7007e4bed56fc1542afa1deef5b3883
Merge "Specify network pool as address/mask"
Merge "Use pooled network for SNAT rule"