Use try-with-resources pattern in RdeParserTest
Use try-with-resources pattern in RdeParserTest

This fixes a whole mess of Eclipse warnings about a Closeable not calling
close().

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135407085

google/nomulus,google/nomulus,google/nomulus,google/nomulus,google/nomulus,google/nomulus