Added additional zones in dhcp config

env

 GCF.dhcp.dns.siteDomain="site1.example.com"
 GCF.dhcp.dns.dynIpsDomain="dhcp.site1.example.com"
 GCF.dhcp.dns.revDomain="100.15.10.in-addr.arpa."
+GCF.dhcp.dns.additionalZones=["101.15.10.in-addr.arpa.", "102.15.10.in-addr.arpa."]
 
 GCF.dhcp.subnet="10.15.100.0"
 GCF.dhcp.netmask="255.255.255.0"

isc-dhcp/config/states/isc-dhcp/dhcpd.conf

         secret "{{ salt['pillar.get']("model:dns:tsig:keys:internal") }}";
 };
 
-zone {{ salt['pillar.get']("model:dhcp:dns:dynIpsDomain") }} {
-    primary {{ salt['pillar.get']("model:dhcp:dns:master") }};
-    key "key-internal";
-}
-
-zone {{ salt['pillar.get']("model:dhcp:dns:siteDomain") }} {
-    primary {{ salt['pillar.get']("model:dhcp:dns:master") }};
-    key "key-internal";
-}
-
-zone {{ salt['pillar.get']("model:dhcp:dns:revDomain") }} {
+{% for zone in (salt['pillar.get']("model:dhcp:dns:additionalZones", []) + [salt['pillar.get']("model:dhcp:dns:dynIpsDomain"), salt['pillar.get']("model:dhcp:dns:siteDomain"), salt['pillar.get']("model:dhcp:dns:revDomain")]) %}
+zone {{ zone }} {
     primary {{ salt['pillar.get']("model:dhcp:dns:master") }};
     key "key-internal";
 }
+{% endfor %}
 
 
 # Custom routes classes