Fix typos in OpenvSwitch admin guide scenario

as noted in the bug report, this guide suffered from two typos that
mixed up the subnet and vlan ID of the two networks described.

Change-Id: I3a406ef21f4f71d13aab7c2ac11d348cc1f83318
Closes-Bug: 1291444
Merge "Fix typos in OpenvSwitch admin guide scenario"