Add setuptools requirement for version below 45.0.0

Versions of setuptools from 45.0.0 dropped python2 support.

Related-Prod: PROD-34533
Change-Id: I53f9b4b6773ea0c5f750c6860f770d35b547b859
diff --git a/tests/test-requirements.txt b/tests/test-requirements.txt
index a0f561a..0480052 100644
--- a/tests/test-requirements.txt
+++ b/tests/test-requirements.txt
@@ -1,2 +1,3 @@
 jsonschema
 reno
+setuptools<45.0.0
\ No newline at end of file