[dts] [PATCH V1] tests:fix some suites impacted by Strip prompt in send_expect

[Yang Leweix <leweix.yang@intel.com>]

fixs following suite impacted by commit f498f50a62e30f6f8fb9c4e1a759e3d35861b978:
    * flow_classify_softnic
	* test_ipv4_acl_jump
	* test_ipv4_acl_table
	* test_ipv6_hash_jump
    * unit_tests_loopback
	* test_link_mode
	* test_loopback_mode
    * distributor
	* maximum_workers  

Signed-off-by: Yang Leweix <leweix.yang@intel.com>
---
 tests/TestSuite_distributor.py           | 2 +-
 tests/TestSuite_flow_classify_softnic.py | 2 +-
 tests/TestSuite_unit_tests_loopback.py   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tests/TestSuite_distributor.py b/tests/TestSuite_distributor.py
index 0f61cc71..cd88977d 100644
--- a/tests/TestSuite_distributor.py
+++ b/tests/TestSuite_distributor.py
@@ -165,7 +165,7 @@ class TestDistributor(TestCase):
         self.verify(len(self.dut_ports) >= 1, "Not enough ports")
 
         cmd_fmt = "%s %s -- -p 0x1"
-        out = self.dut.send_expect("sed -n '/#define RTE_DISTRIB_MAX_WORKERS/p' lib/distributor/distributor_private.h", "# ")
+        out = self.dut.send_expect("sed -n '/#define RTE_DISTRIB_MAX_WORKERS/p' lib/distributor/distributor_private.h", "# ", trim_whitespace=False)
         reg_match = r"#define RTE_DISTRIB_MAX_WORKERS (.*)"
         m = re.match(reg_match, out)
         self.verify(m, "Can't find maximum worker number")
diff --git a/tests/TestSuite_flow_classify_softnic.py b/tests/TestSuite_flow_classify_softnic.py
index db7a81dd..e5937289 100644
--- a/tests/TestSuite_flow_classify_softnic.py
+++ b/tests/TestSuite_flow_classify_softnic.py
@@ -129,7 +129,7 @@ class TestFlowClassifySoftnic(TestCase):
         """
         param = ""
         direct_param = r"(\s+)\[ (\S+) in\|out\|inout \]"
-        out = self.tester.send_expect('tcpdump -h', '# ')
+        out = self.tester.send_expect('tcpdump -h', '# ', trim_whitespace=False)
         for line in out.split('\n'):
             m = re.match(direct_param, line)
             if m:
diff --git a/tests/TestSuite_unit_tests_loopback.py b/tests/TestSuite_unit_tests_loopback.py
index 0198a913..a0467378 100644
--- a/tests/TestSuite_unit_tests_loopback.py
+++ b/tests/TestSuite_unit_tests_loopback.py
@@ -81,7 +81,7 @@ class TestUnitTestsLoopback(TestCase):
         pass
 
     def get_max_traffic_burst(self):
-        pmd_file = self.dut.send_expect("cat app/test/test_pmd_perf.c", "# ", 30)
+        pmd_file = self.dut.send_expect("cat app/test/test_pmd_perf.c", "# ", 30, trim_whitespace=False)
         result_scanner = r"#define MAX_TRAFFIC_BURST\s+([0-9]+)"
         scanner = re.compile(result_scanner, re.DOTALL)
         m = scanner.search(pmd_file)
-- 
2.17.1