TINKERPOP-2106 throw TimeoutException instead of TraversalInterruptedException #1009
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https://issues.apache.org/jira/browse/TINKERPOP-2106
When gremlin executes timeout, it throws an error "TraversalInterruptedException: null".
According to our user feedback(https://github.com/hugegraph/hugegraph/issues/102), the message is not easy to understand. we think it is clearer if it prompts timeout error directly.
This commit converts some InterruptedException to a TimeoutException.