tests: fix memif tests

remote_test.py - Remove 'ret' arg from _remote_exec(), so that the function
                 always reads the reply from the pipe. (fix unmatched request/reply)

memif_test.py - Don't register VppIpRoute to VppObjectRegistry.

Type: fix

Change-Id: I8a51e7ffd68df5f379534f5ddd5ec9367a89be32
Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>

test/test_memif.py

@@ -12,7 +12,6 @@ from vpp_memif import MEMIF_MODE, MEMIF_ROLE, remove_all_memif_vpp_config, \
 from vpp_ip_route import VppIpRoute, VppRoutePath
 
 
-@unittest.skipIf(True, "doesn't work with VppEnums")
 class TestMemif(VppTestCase):
     """ Memif Test Case """
 
@@ -250,8 +249,11 @@ class TestMemif(VppTestCase):
         self.assertTrue(remote_memif.wait_for_link_up(5))
 
         # add routing to remote vpp
-        VppIpRoute(self.remote_test, self.pg0._local_ip4_subnet, 24,
-                   [VppRoutePath(memif.ip4_addr, 0xffffffff)]).add_vpp_config()
+        route = VppIpRoute(self.remote_test, self.pg0._local_ip4_subnet, 24,
+                   [VppRoutePath(memif.ip4_addr, 0xffffffff)],
+                   register=False)
+
+        route.add_vpp_config()
 
         # create ICMP echo-request from local pg to remote memif
         packet_num = 10
@@ -266,6 +268,8 @@ class TestMemif(VppTestCase):
             self._verify_icmp(self.pg0, remote_memif, c, seq)
             seq += 1
 
+        route.remove_vpp_config()
+
 
 if __name__ == '__main__':
     unittest.main(testRunner=VppTestRunner)