[dts] [PATCH V2] fix ptpclient case failed because of tester and dut time zone different

[xu,huilong]

ptpclint test case will sync time with tester and dut. But when tester
and dut time zone not different,test time and dut time not different,
so use UTC time for get tester and dut time

Signed-off-by: xu,huilong <huilongx.xu at intel.com>
---
 tests/TestSuite_ptpclient.py | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/tests/TestSuite_ptpclient.py b/tests/TestSuite_ptpclient.py
index f038bef..f68c81b 100644
--- a/tests/TestSuite_ptpclient.py
+++ b/tests/TestSuite_ptpclient.py
@@ -146,15 +146,10 @@ class TestPtpClient(TestCase):
 
         self.creat_table(Delta_us)
 
-        tester_out = self.tester.send_expect("date '+%Y-%m-%d %H:%M'", "# ")
-        dut_out = self.dut.send_expect("date '+%Y-%m-%d %H:%M'", "# ")
-
-        if tester_out == dut_out:
-            self.verify(tester_out == dut_out, "the DUT time synchronous error")
-        else:
-            tester_out = self.tester.send_expect("date '+%Y-%m-%d %H:%M'", "# ")
-            dut_out = self.dut.send_expect("date '+%Y-%m-%d %H:%M'", "# ")
-            self.verify(tester_out == dut_out, "the DUT time synchronous error")
+        tester_out = self.tester.send_expect("date -u '+%Y-%m-%d %H:%M'", "# ")
+        dut_out = self.dut.send_expect("date -u '+%Y-%m-%d %H:%M'", "# ")
+
+        self.verify(tester_out == dut_out, "the DUT time synchronous error")
 
     def tear_down(self):
         """
-- 
1.9.3