Change in vdsm[master]: tests: use ipv6 gateway properly in preserve_default_route

[Code Review]

From Dan Kenigsberg :

Dan Kenigsberg has submitted this change and it was merged.

Change subject: tests: use ipv6 gateway properly in preserve_default_route
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tests: use ipv6 gateway properly in preserve_default_route

Fixing a typo in preserve_default_route where set_default_route
received an ipv4 address while trying to set ipv6 default route.

Change-Id: I0668dfd2337d50da4aad1dd036a8d520973d5aa7
Signed-off-by: Leon Goldberg 
---
M tests/network/nettestlib.py
1 file changed, 1 insertion(+), 1 deletion(-)

Approvals:
  Jenkins CI: Passed CI tests
  Dan Kenigsberg: Looks good to me, approved
  Martin Polednik: Verified