RFR JDK-8022442: Fix unchecked warnings in HashMap

[Dan Smith]

Update: some minor changes are necessary to LinkedHashMap to be compatible with the HashMap changes (HashMap is unchanged).

Webrev: http://cr.openjdk.java.net/~dlsmith/8022442/webrev.01/

I confirmed that the jdk_util tests pass.

—Dan

On Aug 6, 2013, at 2:11 PM, Dan Smith <daniel.smith at oracle.com> wrote:

> Please review this warnings cleanup.
> 
> Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8022442 (not yet visible)
> Webrev: http://cr.openjdk.java.net/~dlsmith/8022442/webrev.00/
> 
> —Dan