Create "A" type recordset using a list of IPs records

Test name: test_create_A_recordset_multiply_ips
Note: this patch is also fixes missing cleanups and adds
the existing constants to be used in code.

Change-Id: I0904803f7e3ac5635babfc82f409a0e38685c9fa
diff --git a/designate_tempest_plugin/data_utils.py b/designate_tempest_plugin/data_utils.py
index 2f61d97..c9d3f6d 100644
--- a/designate_tempest_plugin/data_utils.py
+++ b/designate_tempest_plugin/data_utils.py
@@ -141,10 +141,12 @@
         'ttl': ttl}
 
 
-def rand_a_recordset(zone_name, ip=None, **kwargs):
-    if ip is None:
-        ip = rand_ip()
-    return rand_recordset_data('A', zone_name, records=[ip], **kwargs)
+def rand_a_recordset(zone_name, ips=None, **kwargs):
+    if ips is None:
+        return rand_recordset_data(
+            'A', zone_name, records=[rand_ip()], **kwargs)
+    else:
+        return rand_recordset_data('A', zone_name, records=ips, **kwargs)
 
 
 def rand_aaaa_recordset(zone_name, ip=None, **kwargs):