Randomize second octet to avoid test vlan IP collision

The VlanTransparencyTest tests fail when the randomly chosen vlan
IP gets assigned to 192.168.122.x/24. This patch replaces the
fixed second octet with the same randomized value as the third
octet to avoid conflicts.

Related-Bug: OSPRH-11751
Closes-Bug: #2112541
Change-Id: I3f4ba272f44f2fd3132741ccc30b4442064dabdd
1 file changed