feat: Add search domains and nameserver for prod

Closes #157 (closed)

ansible/group_vars/prod

 ---
+  # cheaha.node related
   hostname_lookup_table:
     - "172.20.0.24 cheaha-master02.cm.cluster cheaha-master02"
     - "172.20.0.22 cheaha-master01.cm.cluster cheaha-master01"
     - "172.20.0.25 master.cm.cluster master localmaster.cm.cluster localmaster ldapserver.cm.cluster ldapserver"
+  domain_search_list:
+    - cm.cluster
+    - rc.uab.edu
+    - ib.cluster
+    - drac.cluster
+    - eth.cluster
+    - ib-hdr.cluster
+  nameserver_list:
+    - 172.20.0.25
 
   bright_openldap_path: "/cm/local/apps/openldap"
   ldap_cert_path: "{{bright_openldap_path}}/etc/certs"