correct cancel task integration test to be deterministic

Signed-off-by: Maria Shaldibina <mariash@pivotallabs.com>
removed noisy monkey patched logging in sequel connection thread pool class

Signed-off-by: Maria Shaldibina <mariash@pivotallabs.com>
Remove extra logging from thread pool

Signed-off-by: Maria Shaldibina <mariash@pivotallabs.com>