Disable pytest logs capture

In pytest 3.3.0 was merged the pytest-cachlog plugin
which is now enabled by default [1]

- Disable this logging module for tcp-qa tests.

[1] pytest-dev/pytest#2794

Change-Id: I60d9ba42ac88af80d263c6cadff10cb69d6d5e2a

pytest.ini

@@ -1,3 +1,3 @@
 [pytest]
-addopts = -vvv -s -p no:django -p no:ipdb --junit-xml=nosetests.xml --tb=native
+addopts = -vvv -s -p no:django -p no:ipdb -p no:logging --junit-xml=nosetests.xml --tb=native
 testpaths = tcp_tests