Upgrade pytest to 4.4.1 (#23584)

requirements_test.txt

@@ -14,5 +14,5 @@ pytest-aiohttp==0.3.0
 pytest-cov==2.6.1
 pytest-sugar==0.9.2
 pytest-timeout==1.3.3
-pytest==4.4.0
+pytest==4.4.1
 requests_mock==1.5.2

requirements_test_all.txt

@@ -15,7 +15,7 @@ pytest-aiohttp==0.3.0
 pytest-cov==2.6.1
 pytest-sugar==0.9.2
 pytest-timeout==1.3.3
-pytest==4.4.0
+pytest==4.4.1
 requests_mock==1.5.2