Longer thread / greenlet join timeout in tests.

Author: A. Jesse Jiryu Davis

test/test_pooling_base.py

@@ -92,7 +92,7 @@ def alive(self):
  return self.thread.isAlive()
 
  def join(self):
- self.thread.join(5)
+ self.thread.join(10)
  if self.use_greenlets:
  msg = "Greenlet timeout"
  else: