Tests hanging on CI

[Ben Cooksley]

Hi KDevelop Devs,

Currently we have an issue where the KDevelop's test_cmakemanager test
doesn't cleanup after itself properly on the CI system. This leads to
it leaving behind a "cmake -E server" process, which due to how CTest
works means it will wait indefinitely.

This requires manual intervention to sort out.

Could someone please investigate and sort this out?

A log showing the issue can be found at
https://build.kde.org/job/KDevelop/job/kdevelop/job/kf5-qt5%20SUSEQt5.10/26/consoleFull

Thanks,
Ben