RFR: 8254711: Add java.security.Provider.getService JFR Event

[Sean Coffey]

Add a JFR Event for `java.security.Provider.getService(String type, String algorithm)` calls.

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Commit messages:
 - Track successful getInstance calls only
 - Merge branch 'master' into 8254711-jfr-jca
 - Refactor and use of static Event on
 - Merge branch 'master' into 8254711-jfr-jca
 - new test
 - Event iteration
 - Merge branch 'master' into 8254711-jfr-jca
 - JFR edits

Changes: https://git.openjdk.org/jdk/pull/9657/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9657&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8254711
  Stats: 305 lines in 8 files changed: 269 ins; 27 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/9657.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9657/head:pull/9657

PR: https://git.openjdk.org/jdk/pull/9657