Changes

callstack.core: Add kernel thread statuses to tests

[Added] KernelAnalysisStub to add kernel thread statuses to tests
[Added] getStatusIntervalsForThreads to KernelThreadInformationProvider

To add these tests, a stub of the kernel analysis has been added and the
FlameChartDP has been modified to depend on the HostModel and not query
directly from the ThreadStatusDP.

To make the changes to the FlameChartDP, the CompositeHostModel has been
modified to query the thread statuses from multiple threads in one
query.

Signed-off-by: Arnaud Fiorini <fiorini.arnaud@gmail.com>
Change-Id: I1ae1b729b0c29c267915e4cb2110d838547cae9f
Reviewed-on: https://git.eclipse.org/r/c/tracecompass/org.eclipse.tracecompass/+/202595
Reviewed-by: Marco Miller <marco.miller@ericsson.com>
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>