The test submits 3 jobs in an environment rate-limited to two, and verifies
that the first 2 jobs are running whereas the third one remains queued. However,
it takes for Ganeti some time to get a submitted job to actually being confirmed
waiting (in some circumstances over a second). So wait a bit longer to avoid
losing the race. While there, increase the time of the delay jobs to avoid
them finishing during that test in an extremely slowly running QA. (Note that
the jobs are killed forcefully at the end of the test, so that time is never
really waited for.)

Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Petr Pudlak <pudlak@google.com>