Fixes argument order of quantumv2.api.get_instance_nw_info

Fixes bug #1159042

Change-Id: I04136707cdf2ca716dabd92aa7a471c291a3b4eb
(cherry picked from commit be5ff02f7484a3594f3adeac56ed7aa1ddb475d3)
Merge "Fixes argument order of quantumv2.api.get_instance_nw_info" into stable/grizzly