RFR: 8155246: Throw error if default java.security file is missing [v3]

[Sean Coffey]

> In the broken case where the conf/security/java.security configuration file doesn't exist, the JDK should throw an Error. 
> 
> CSR in progress.

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

  Incorporate review comments

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/9747/files
  - new: https://git.openjdk.org/jdk/pull/9747/files/e2f04835..0ae24472

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9747&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9747&range=01-02

  Stats: 6 lines in 2 files changed: 0 ins; 2 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/9747.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9747/head:pull/9747

PR: https://git.openjdk.org/jdk/pull/9747