Fix ip in discovery

.travis.yml

@@ -9,7 +9,6 @@ services:
   - docker
 
 before_install:
-  - docker pull ubuntu:xenial
   - cd build && ./build.sh surok_image
   - ./build.sh alpine
   - ./build.sh centos

surok/discovery.py

@@ -59,7 +59,7 @@ def do_query(fqdn, loglevel):
             server = {'name': name, 'port': port, 'ip': []}
             a_query = resolver.query(name, 'A')
             for a_rdata in a_query:
-                server['ip'].append(a_rdata)
+                server['ip'].append(a_rdata.address)
                 servers.append(server)
     except DNSException as e:
         if loglevel != 'info':