run-tests: remove arguments from Test._runcommand Now that runcommand is part of the Test class, arguments that were previously coming from Test attributes can now be switched to lookups inline.

run-tests: move run into Test class Future patches will change how replacements work. Since the logic in run() is strongly tied to the operation of individual tests and since there is potential to make the implementation simpler by giving the function access to Test attributes, move it into Test.

run-tests: wait for test threads after first error The test runner has the ability to stop on first error. Tests are executed in new Python threads. The test runner starts new threads when it has capacity to do so. Before this patch, the "stop on first error" logic would return immediately from the "run tests" function, without waiting on test threads to complete. There was thus a race between the test runner thread doing cleanup work and the test thread performing activity. For example, the test thread could be in the middle of executing a test shell script and the test runner could remove the test's temporary directory. Depending on timing, this could result in any number of output from the test runner. This patch eliminates the race condition by having the test runner explicitly wait for test threads to complete before continuing. I discovered this issue as I modified the test harness in a subsequent patch and was reliably able to tickle the race condition.