Something changed in requests/urllib3 library and now it sends
requests with url in a lower-case. It affects test_version_discovery
test because we use url in camel-case.
This patch changes test url to lower-case to be compatible with old
and new behaviours.
Change-Id: I4ae9715b124adb0a2e0115c9b00ab16576665f72
Closes-Bug: #1643874