Don't publish artefacts when TeamCity build is red.

[psuzzi]

We need to fix the publication behavior. In the case visible below, the tests are succeeding, but the Teamcity build is failing, because we set the build to fail when there is a consistent decrease in the number of test cases.

When no test is failing, but Teamcity fails, no artifact should be published - which is not the case in this example.