[master] Use IPv4 addresses in tests consistently

tests/lettuce/configurations/xfrin/retransfer_master.conf

@@ -11,7 +11,7 @@
         "database_file": "data/example.org.sqlite3",
         "listen_on": [ {
             "port": 47807,
-            "address": "::1"
+            "address": "127.0.0.1"
         } ]
     },
     "Xfrout": {

tests/lettuce/features/xfrin_bind10.feature

@@ -19,7 +19,7 @@ Feature: Xfrin
     And wait for bind10 stderr message ZONEMGR_STARTED
 
     A query for www.example.org should have rcode REFUSED
-    When I send bind10 the command Xfrin retransfer example.org IN ::1 47807
+    When I send bind10 the command Xfrin retransfer example.org IN 127.0.0.1 47807
     Then wait for new bind10 stderr message XFRIN_TRANSFER_SUCCESS not XFRIN_XFR_PROCESS_FAILURE
     A query for www.example.org should have rcode NOERROR
 
@@ -28,7 +28,7 @@ Feature: Xfrin
     # should be 13, counting the duplicated SOA.
     # At this point we can confirm both in and out of AXFR for a zone
     # containing an NSEC3 RR.
-    When I do an AXFR transfer of example.org from ::1 47807
+    When I do an AXFR transfer of example.org from 127.0.0.1 47807
     Then transfer result should have 13 rrs
 
     The file data/test_nonexistent_db.sqlite3 should exist