RFR: JDK-8281000 ClassLoader::registerAsParallelCapable throws NPE if caller is null [v5]

[Tim Prinzing]

> JDK-8281000 ClassLoader::registerAsParallelCapable throws NPE if caller is null

Tim Prinzing has updated the pull request incrementally with three additional commits since the last revision:

 - reformat test summary
 - reformat test summary
 - improve test name and remove experimental test code

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7448/files
  - new: https://git.openjdk.java.net/jdk/pull/7448/files/533a0660..a449acdc

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7448&range=04
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7448&range=03-04

  Stats: 129 lines in 3 files changed: 58 ins; 70 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7448.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7448/head:pull/7448

PR: https://git.openjdk.java.net/jdk/pull/7448