[jdk11u-dev] RFR: 8292177: InitialSecurityProperty JFR event

[Andrew John Hughes]

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](https://bugs.openjdk.org/browse/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`)

-------------

Commit messages:
 - Backport 95f23f7d82c0ebfd94c72b08695f9f415587a16a

Changes: https://git.openjdk.org/jdk11u-dev/pull/2827/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2827&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292177
  Stats: 383 lines in 11 files changed: 248 ins; 0 del; 135 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2827.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2827/head:pull/2827

PR: https://git.openjdk.org/jdk11u-dev/pull/2827