Add setuptools requirement for version below 45.0.0

Versions of setuptools from 45.0.0 dropped python2 support.

Change-Id: Iedb9833f1820a96379996c98274b2c8b708ccb46
Related-Prod: PROD-34533
(cherry picked from commit 64b931aa8e7c443038bf4ee0a908630ee29a397c)
diff --git a/tests/test-requirements.txt b/tests/test-requirements.txt
index a0f561a..7188b2b 100644
--- a/tests/test-requirements.txt
+++ b/tests/test-requirements.txt
@@ -1,2 +1,3 @@
 jsonschema
 reno
+setuptools<45.0.0