Review request: 7123679 Update regression tests that use os.name to work on MacOSX

[Kurchi Hazra]

Hi,

Some test files in jdk/test have behavior defined by what the os.name 
property of the system evaluates to.
These changes adds Mac OS X as a recognized OS in a bunch of such test 
files.

In addition, since many tests are failing with the 
sun.nio.ch.KQueueSelectorProvider,
the changes also include using sun.nio.ch.PollSelectorProvider as the 
DefaultSelector for now
until the kqueue selector is fixed.

Webrev:
http://cr.openjdk.java.net/~khazra/7123679/webrev.00/


Thanks,
Kurchi