Fixes #5554 - fixed hostgroup and fqdn validations in multiple matchers

In line 153 `h.mac = h.mac.succ` when h.mac ends with 2f it is changed to 2g and becomes invalid.
Somehow the test I added for this PR caused the sequence of macs to end with 2f for the host in this test and so the test failed.
Setting the host to a different mac solves the problem.
Another option is not using succ or checking if the mac becomes invalid and then changing it again