Set max_microversion 2.43 for virtual_interfaces tests

The compute os-virtual-interfaces API is deprecated from the
Microversion 2.44, so we should set max_microversion = '2.43'
for compute virtual_interfaces tests.

This is based on work in Tempest [0].

[0] Ie1793802fa33898ffbdad16b58b085894e66d4d1

Partially Implements blueprint: clear-deprecated-api

Change-Id: Ib63bab15d4690d23f7ffbd8724ec1351929b94c5
1 file changed