make test: remove generic imports

Change-Id: I55b89f0d9fb082c7763b64b09ab14573468c6704
Signed-off-by: Klement Sekera <ksekera@cisco.com>

test/test_ipsec_nat.py

@@ -7,7 +7,8 @@ from scapy.layers.inet import ICMP, IP, TCP, UDP
 from scapy.layers.ipsec import SecurityAssociation, ESP
 from util import ppp, ppc
 from template_ipsec import TemplateIpsec
-from vpp_ipsec import *
+from vpp_ipsec import VppIpsecSA, VppIpsecSpd, VppIpsecSpdEntry,\
+        VppIpsecSpdItfBinding
 from vpp_ip_route import VppIpRoute, VppRoutePath
 from vpp_ip import DpoProto