tree 52e6ea20e94f54f1358e16cb9f467410f1d0b3e7
parent acba5510785258949679304f3e1a55e53b851962
author Sergey Shnaidman <sshnaidm@cisco.com> 1409681100 +0400
committer Sergey Shnaidman <sshnaidm@cisco.com> 1414061838 +0400

Create subnet without gateway and explicit IP ver

Now it's impossible to create subnet without gateway in network
tests. This patch allows you to set gateway explicitly to None.
Backward compatibility is supported: by default it creates
subnet with default gateway as before. Also it adds possibility
to create subnet with specific IP version when you need to create
two subnets in one tenant of different IP version ("dual-stack").
Fixed attributes test for new requirements and added 2 anothers.

Change-Id: I7aca5e07be436f20cba90339785b46182d97fead