Disabling akonadi test runner infrastructure across all repositories

[Ben Cooksley]

Hi all,

For some time now the Akonadi Test Runner infrastructure has had
issues on the CI system where it will fail to properly shutdown the
akonadiserver (and associated subprocesses) that it starts up for
tests.

This leads to jobs on the CI system becoming indefinitely stuck as
CTest will wait indefinitely for subprocesses spawned by tests to
exit. This in turn requires manual cleanup.

Tonight jobs for kdepim-runtime and akonadi itself both required
manual assistance to complete. Other PIM repositories have in the past
required similar assistance.

Given that the issue is not limited to a single test or repository,
i'd therefore like to propose no-oping the entire CMake macro
responsible for the akonadi test runner framework and disabling all
tests that make use of it globally across all repositories until this
issue can be rectified.

Regards,
Ben