RFR: 8292297: Fix up loading of override java.security properties file

Wed Sep 14 15:58:40 UTC 2022

On Tue, 13 Sep 2022 14:58:11 GMT, Sean Coffey <coffeys at openjdk.org> wrote:

> Ensure that security properties are only overridden if the override security properties file exists. 
> Refactored some of the code in Security class initialization also.
> Extra test coverage for security properties file options.

Looks good to me.

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Marked as reviewed by xuelei (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10251