Fix: read_ip_addresses should return ipaddr object

Interactive prompt callback returns list of str instead of CheckedIPAddress
instances.

Ticket: https://fedorahosted.org/freeipa/ticket/4747
Reviewed-By: Jan Cholasta <jcholast@redhat.com>

ipaserver/install/installutils.py

@@ -244,7 +244,7 @@ def read_ip_addresses(host_name, fstore):
         except Exception, e:
             print "Error: Invalid IP Address %s: %s" % (ip, e)
             continue
-        ips.append(ip)
+        ips.append(ip_parsed)
 
     return ips