make test: build test/ext when doing coverage

This makes VAPI/VOM tests part of code coverage report.

Change-Id: I66511b0a59880c2a64daecd37088268bdf5e1269
Signed-off-by: Klement Sekera <ksekera@cisco.com>

test/Makefile

@@ -172,7 +172,7 @@ doc: verify-python-path $(PIP_PATCH_DONE)
 wipe-doc:
 	@make -C doc wipe BR=$(BR)
 
-cov: wipe-cov reset verify-python-path $(PAPI_INSTALL_DONE)
+cov: wipe-cov reset ext verify-python-path $(PAPI_INSTALL_DONE)
 	@lcov --zerocounters --directory $(VPP_TEST_BUILD_DIR)
 	@test -z "$(EXTERN_COV_DIR)" || lcov --zerocounters --directory $(EXTERN_COV_DIR)
 	$(call retest-func)

test/test_vapi.py

@@ -4,9 +4,6 @@
 import unittest
 import os
 import signal
-import subprocess
-from threading import Thread
-from log import single_line_delim
 from framework import VppTestCase, running_extended_tests, \
     running_on_centos, VppTestRunner, Worker
 
@@ -37,7 +34,8 @@ class VAPITestCase(VppTestCase):
                 os.killpg(os.getpgid(worker.process.pid), signal.SIGTERM)
                 worker.join()
             except:
-                raise Exception("Couldn't kill worker-spawned process")
+                self.logger.debug("Couldn't kill worker-spawned process")
+                raise
         if error:
             raise Exception(
                 "Timeout! Worker did not finish in %ss" % timeout)

test/test_vom.py

@@ -4,11 +4,8 @@
 import unittest
 import os
 import signal
-import subprocess
-from threading import Thread
-from log import single_line_delim
 from framework import VppTestCase, running_extended_tests, \
-    running_on_centos, VppTestRunner, Worker
+    VppTestRunner, Worker
 
 
 @unittest.skipUnless(running_extended_tests(), "part of extended tests")