Fix exception handling in scheduler

sys.exc_info() return a tuple with (type, value, traceback) where
value is the exception instance. When reraising the exception,
value must be used instead of trying to raise the type instance.

Change-Id: I6a13dfd275fdc368c7eeff9bf1e0b4dc2b1526bc
Story: 2001096
Task: 4757
1 file changed