RFR: 8168388: GetMousePositionTest fails with the message "Mouse position should not be null" [v2]

[Alexander Zuev]

> 8168388: GetMousePositionTest fails with the message "Mouse position should not be null"

Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:

  Removed regtesthepler library requirement

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6028/files
  - new: https://git.openjdk.java.net/jdk/pull/6028/files/8c3c08d1..e53239a1

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6028&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6028&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6028.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6028/head:pull/6028

PR: https://git.openjdk.java.net/jdk/pull/6028