[sysadmin/ci-tooling] build-specs/Plasma: Disable execution of tests for plasma-integration.

[Ben Cooksley]

Hi David,

Unfortunately it seems that the issue is still occurring as it has
reappeared and blocked a Linux builder for ~22 hours.
Same behaviour as last time i'm afraid - the kioslave processes had
been directly launched by the test and were hanging as they were
previously.

Any ideas?

Cheers,
Ben