RFR : 8019979 : Replace CheckPackageAccess test with better one from closed repo

[Seán Coffey]

I'd like to move this testcase from our internal test repo and replace 
the current "test/java/lang/SecurityManager/CheckPackageAccess.java" 
testcase . It's a straightforward test to ensure that the package 
restrictions enforced via the java.security file are those expected.

The testcase should be updated any time the package.access or 
package.definition properties are updated.

webrev : http://cr.openjdk.java.net/~coffeys/webrev.8019979/webrev/ 
<http://cr.openjdk.java.net/%7Ecoffeys/webrev.8019979/webrev/>
bug report : http://bugs.sun.com/view_bug.do?bug_id=8019979

regards,
Sean.