[dts] [PATCH] tests: fix the verify issue in mtu test

[Xinfeng Zhao]

the output of mtu test as below, so should modify the verified pattern

ens4      Link encap:Ethernet  HWaddr 7e:62:c3:58:16:11
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

Signed-off-by: Xinfeng Zhao <xinfengx.zhao at intel.com>
---
 tests/TestSuite_vf_kernel.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tests/TestSuite_vf_kernel.py b/tests/TestSuite_vf_kernel.py
index 92b1202..bee30a0 100644
--- a/tests/TestSuite_vf_kernel.py
+++ b/tests/TestSuite_vf_kernel.py
@@ -517,7 +517,8 @@ class TestVfKernel(TestCase):
         vm0_intf1 = self.vm0_dut.ports_info[1]['intf']
         self.vm0_dut.send_expect("ifconfig %s up" % self.vm0_intf0, "#")
         out = self.vm0_dut.send_expect("ifconfig %s" % self.vm0_intf0, "#")
-        self.verify('mtu 1500' in out, "modify MTU failed")
+        result = re.search('mtu\W1500', out, flags=re.I)
+        self.verify(result is not None, "modify MTU failed")
         self.tester.send_expect("ifconfig %s mtu 3000" % self.tester_intf, "#")
 
         self.dut_testpmd.execute_cmd('stop')
-- 
2.17.1