8292177: InitialSecurityProperty JFR event

[gnu-andrew]

This backport introduces the JFR security event, InitialSecurityProperty, and along with it, the caching of the initial security properties which is also used by JDK-8281658 to show the security properties with -XshowSettings.

The change was backported to the Oracle fork of 11u in 11.0.20.

The following changes were necessary for the backport:

• JavaSecurityPropertiesAccess is moved to jdk.internal.misc where SharedSecrets lives in 11u
• ensureClassInitialized in SharedSecrets is called from the unsafe instance in 11u, as with other get*Access() methods in that class
• The patch to module-info.java is not needed as jdk.jfr already has access to jdk.internal.misc in 11u. The 17u addition is to jdk.internal.access.
• There are context differences in JDKEvents.java due to events introduced in later JDK versions.
• The EventNames.java test includes a huge unrelated change to reorganise the order of the variable modifiers. This was applied manually to the names in 11u, which differ slightly from those in 17u.

All jdk.jfr.event tests passed, including the new one, with the exception of TestNative, but that seems to be a setup issue rather than a regression caused by this patch (Error. Use -nativepath to specify the location of native code)

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Progress

• [x] Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• [x] Change must not contain extraneous whitespace
• [x] Commit message must refer to an issue
• [ ] JDK-8292177 needs maintainer approval

Issue

• JDK-8292177: InitialSecurityProperty JFR event (Enhancement - P4)

Reviewers

• Paul Hohensee (@phohensee - Reviewer)

Reviewing

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