RFR: 8273921: Refactor NSK/JDI tests to create thread using factory [v6]

[Leonid Mesnik]

> 8273921: Refactor NSK/JDI tests to create thread using factory

Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:

  fixed line numbers after Idea autoimport.

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5515/files
  - new: https://git.openjdk.java.net/jdk/pull/5515/files/f98cbff2..1e241214

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5515&range=05
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5515&range=04-05

  Stats: 8 lines in 8 files changed: 7 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5515.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5515/head:pull/5515

PR: https://git.openjdk.java.net/jdk/pull/5515