Now requests-mock records request url in log[1], so it is
invalid to check that the logger output does NOT contain
request url.
Also, fix url passed to request mock as now it requires
complete url is passed
[1] https://github.com/jamielennox/requests-mock/pull/93
Change-Id: I4bab30a6705b7cab6b5a569dd61c442263e39995