vpc: create vpc tiers with dns server of vpc instead of zone (apache#8621)

* vpc: create vpc tiers with dns server of vpc instead of zone

with this change
```
root@r-575-VM:~# cat /etc/dnsmasq.d/cloud.conf
dhcp-hostsfile=/etc/dhcphosts.txt
listen-address=127.0.0.1,172.17.1.1,172.17.2.1,172.17.3.1
dhcp-range=set:interface-eth2-0,172.17.1.1,static
dhcp-option=tag:interface-eth2-0,15,cs2cloud.internal
dhcp-option=tag:interface-eth2-0,6,172.17.1.1,10.0.32.1,8.8.8.8
dhcp-option=tag:interface-eth2-0,3,172.17.1.1
dhcp-option=eth2,26,1500
dhcp-option=tag:interface-eth2-0,1,255.255.255.0
dhcp-range=set:interface-eth3-1,172.17.2.1,static
dhcp-option=tag:interface-eth3-1,15,cs2cloud.internal
dhcp-option=tag:interface-eth3-1,6,172.17.2.1,8.8.8.8,1.1.1.1
dhcp-option=tag:interface-eth3-1,3,172.17.2.1
dhcp-option=eth3,26,1500
dhcp-option=tag:interface-eth3-1,1,255.255.255.0
dhcp-range=set:interface-eth4-2,172.17.3.1,static
dhcp-option=tag:interface-eth4-2,15,cs2cloud.internal
dhcp-option=tag:interface-eth4-2,6,172.17.3.1,8.8.8.8,1.1.1.1
dhcp-option=tag:interface-eth4-2,3,172.17.3.1
dhcp-option=eth4,26,1500
dhcp-option=tag:interface-eth4-2,1,255.255.255.0
root@r-575-VM:~#
```

* Update PR8621 test:ArgumentMatchers instead of Matchers in test

Author: weizhouapache

server/src/test/java/com/cloud/network/NetworkModelImplTest.java

@@ -41,6 +41,7 @@
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.Mockito;
+import org.mockito.junit.MockitoJUnitRunner;
 import org.springframework.test.util.ReflectionTestUtils;
 
 import java.util.ArrayList;
@@ -49,7 +50,6 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
-import org.mockito.junit.MockitoJUnitRunner;
 
 @RunWith(MockitoJUnitRunner.class)
 public class NetworkModelImplTest {