[9] RFR: 8144539: Update PKCS11 tests to run with security manager

[Artem Smotrakov]

Hello,

Please review this enhancement for PKCS11 tests which updates them to 
run with both enabled and disable security manager.

Tests enable a security manager before running actual test cases for 
each particular security provider, and disable it when the test cases 
finish. This helps to avoid granting lots of permissions because 
PKCS11Test class does some initialization which accesses some protected 
operations.

There also are several updates:
- tests run in a separate JVM since PKCS11Test class modifies system 
properties, adds and removes security providers (even if a security 
manager is not set)
- added new policy files (some tests need a separate policy file since 
they require some extra permissions, but I wouldn't add them for all tests)
- updated the code to use try-with-resources blocks where possible
- replaced Vector with ArrayList since it doesn't seem to need 
synchronization
- removed using internal sun.security.util.ECUtil class
- some cosmetic changes

I have run the updated tests on all supported generic platforms, they 
seem to work fine.

Bug: https://bugs.openjdk.java.net/browse/JDK-8144539
Webrev: http://cr.openjdk.java.net/~asmotrak/8144539/webrev.01/

Artem