Update builtin UDFs to use @OutputSchema
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Key: PIG-2361
URL: https://issues.apache.org/jira/browse/PIG-2361
Project: Pig
Issue Type: Improvement
Reporter: Dmitriy V. Ryaboy
We can reduce the amount of code in our codebase and simultaneously provide
examples of how to use the feature introduced in PIG-2151 by replacing
implementations of outputSchema in built-in UDFs by @OutputSchema annotations.
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