core.ppyx: enable check watchers
disable test_urllib2net.OtherNetworkTest.test_ftp

too slow
test___monkey_patching: set timeout to 120s
test__threadpool.py: increase expected kill.elapsed

To prevent this:

======================================================================
FAIL: test_terminate (__main__.TestPool10)
----------------------------------------------------------------------

Traceback (most recent call last):

File "test__threadpool.py", line 176, in test_terminate

assert kill.elapsed < 0.5, kill.elapsed

AssertionError: 0.564028263092041
greentest.py: do gc.collect() x 3
backport testrunner from master branch