cleanup: Remove securityManager use on startup

[BradWalker]

cleanup: Remove securityManager use on startup

desc: This change removes the use of securityManager on startup of netbeans. This is a fairly simple change but had far reaching impacts as it deals w/ startup. For this reason, I created this change just for this issue.

In addition, as I read the code, netbeans.jnlp.fixPolicy is always false. Meaning the fixPolicy() will never execute.

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[mbien]

netbeans.jnlp.fixPolicy is always false. Meaning the fixPolicy() will never execute.

JNLP is part of webstart/applets. So yes this code (jnlp-src/*, which includes the Main class itself) won't run during regular NB startup.

This means that the PR title and the commit message makes a somewhat misleading promise. It might be better to delay removal of this specific SM usage and remove the JNLP integration entirely later (without breaking it via small paper cuts). (although I believe its unlikely that anyone is still using this)

Curious what others think.