[Java] Fix bug when actor creation task fails

[raulchen]

When an actor creation task fails, we should save the exception and re-raise it for the following actor tasks.
This implements the same logic as

ray/python/ray/worker.py

Lines 209 to 218 in 7124320

	def mark_actor_init_failed(self, error):
	"""Called to mark this actor as failed during initialization."""
	self.actor_init_error = error
	def reraise_actor_init_error(self):
	"""Raises any previous actor initialization error."""
	if self.actor_init_error is not None:
	raise self.actor_init_error

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[jovany-wang]

It looks good to me.

[jovany-wang]

Map and HashMap do not seem to be used in your added codes.

[raulchen]

Good catch!

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