RFR: 8292177: InitialSecurityProperty JFR event [v2]

[Sean Coffey]

> New JFR event to record state of initial security properties.
>  
> Debug output is also now added for these properties via -Djava.security.debug=properties

Sean Coffey has updated the pull request incrementally with one additional commit since the last revision:

  Null check on Properties

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10394/files
  - new: https://git.openjdk.org/jdk/pull/10394/files/5343a056..aed938d2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10394&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10394&range=00-01

  Stats: 7 lines in 1 file changed: 2 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/10394.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10394/head:pull/10394

PR: https://git.openjdk.org/jdk/pull/10394