RFR: 8265426: Update java.security to use instanceof pattern variable [v5]

[Patrick Concannon]

> Hi,
> 
> Could someone please review my code for updating the code in the `java.security` package to make use of the `instanceof` pattern variable?
> 
> Kind regards,
> Patrick

Patrick Concannon has updated the pull request incrementally with one additional commit since the last revision:

  8265426: changed order of equals check; refactored Identity.equals method

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3687/files
  - new: https://git.openjdk.java.net/jdk/pull/3687/files/bd433d6d..cbf2841e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3687&range=04
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3687&range=03-04

  Stats: 12 lines in 3 files changed: 0 ins; 7 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3687.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3687/head:pull/3687

PR: https://git.openjdk.java.net/jdk/pull/3687