Improve Domain Controller DNS IP Configuration Health Check

[rebelinux]

Improve DNS IP configuration to better detect 127.0.0.1 position.

Example:

DC IP	Preferred DNS	Alternate DNS	DNS3	DNS4	Best Practice
10.10.10.20	10.10.10.25	127.0.0.1	10.10.10.28	10.10.10.29	Yes
10.10.10.20	10.10.10.20	10.10.10.25	10.10.10.28	127.0.0.1	NOOO
10.10.10.20	127.0.0.1	10.10.10.20	10.10.10.28	10.10.10.25	Hell NO

if there are 4 IPs configured as DNS, the IP 127.0.0.1 can never be the first one.

[rebelinux]