move hostname stuff to libs.tools.resolve_identifier

libs/tools.py

@@ -42,6 +42,11 @@ def resolve_identifier(repo, identifier):
         if node.metadata.get('external_ipv4', None):
             found_ips.add(ip_address(node.metadata.get('external_ipv4')))
 
+        try:
+            found_ips.add(ip_address(node.hostname))
+        except ValueError:
+            pass
+
     ip_dict = {
         'ipv4': set(),
         'ipv6': set(),