[dts] [PATCH V1 2/2] tests/ice_limit_value_test: optimize scripts

[Song Jiale <songx.jiale@intel.com>]

1. when the dpdk testpmd exits abnormally, the port will not be initialized, and sometimes
the other test cases will be affected. therefore, after the test, should use quit to
close the dpdk testpmd normally to avoid the impact between cases.
2. the object named "self.session_third" is undefined, delete useless code.

Signed-off-by: Song Jiale <songx.jiale@intel.com>
---
 tests/TestSuite_ice_limit_value_test.py | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/tests/TestSuite_ice_limit_value_test.py b/tests/TestSuite_ice_limit_value_test.py
index 06160c0a..d6f2f969 100644
--- a/tests/TestSuite_ice_limit_value_test.py
+++ b/tests/TestSuite_ice_limit_value_test.py
@@ -1256,13 +1256,10 @@ class TestICELimitValue(TestCase):
 
     def tear_down(self):
         # destroy all flow rule on port 0
-        self.dut.kill_all()
-        self.destroy_env()
         if getattr(self, "session_secondary", None):
             self.dut.close_session(self.session_secondary)
-        if getattr(self, "session_third", None):
-            self.dut.close_session(self.session_third)
+        self.destroy_env()
+        self.dut.kill_all()
 
     def tear_down_all(self):
         self.dut.kill_all()
-        self.destroy_env()
-- 
2.17.1