RFR: 8277353: java/security/MessageDigest/ThreadSafetyTest.java test times out [v2]

[Sibabrata Sahoo]

> This Test gets timeout during low cpu availability. It is modified to support extended timeout period during JTREG execution.

Sibabrata Sahoo has updated the pull request incrementally with one additional commit since the last revision:

  8277353: java/security/MessageDigest/ThreadSafetyTest.java test times out

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6626/files
  - new: https://git.openjdk.java.net/jdk/pull/6626/files/325e351d..9a197651

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6626&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6626&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6626.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6626/head:pull/6626

PR: https://git.openjdk.java.net/jdk/pull/6626