Add STRICT_RESPONSE_HEADERS check to gabbi tests

This uses a new feature in wsgi_intercept 1.4.1 that checks to make
sure that response headers are native str type (different things in
Python 2 and 3). Since Pecan is well behaved this "just works".
Tested locally with both py27 and py35.

Change-Id: I1406cfbfa14f69132fc91549779424b8427e7b78

gnocchi/tests/gabbi/test_gabbi.py

@@ -18,10 +18,12 @@
 import os
 
 from gabbi import driver
+import wsgi_intercept
 
 from gnocchi.tests.gabbi import fixtures
 
 
+wsgi_intercept.STRICT_RESPONSE_HEADERS = True
 TESTS_DIR = 'gabbits'
 
 

setup.cfg

@@ -75,6 +75,7 @@ test =
     doc8
     tooz>=1.38
     keystonemiddleware>=4.0.0
+    wsgi_intercept>=1.4.1
 
 [global]
 setup-hooks =