oeqa/core/threaded: Add new module with OETestLoaderThreaded
The threded module will implement Thread support into the OEQA
framework.
The OETestLoaderThreaded overrides discover to return a list of
suites every suite will be run by a separate Thread.
Some design considerations are:
- All the tests of a certain module needs to be run at one thread
because unittest framework needs to keep track of setUp{Module,
Class,} and tearDown{Module, Class,}.
- Tests that depends on other needs to be run at the same thread
because OEQA framework look at the status of dependant test to
decide if skip or not, this constraint can be change in the future
but a sync mechanishm is needed to implement between the Threads.
[YOCTO #11450]
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
