Merge jdk7-b132

Merge

7020047: Project Coin: generate null-check around try-with-resources close call

7020626: diamond: add diagnostic test for diamond and non-generic classes

7018859: javac turn off the Zip optimization by default

7020043: Project Coin: diamond allowed on non-generic type

6990136: Cleanup use of Type.clone()

Merge

7017104: improve error reporting for uncaught/undeclared exceptions from try-with-resources

7017664: Add listeners infrastracture to javac scopes

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