RFR: 8262000: jdk/jfr/event/gc/detailed/TestPromotionFailedEventWithParallelScavenge.java failed with "OutOfMemoryError: Java heap space"

[Leo Korinth]

By relaxing the matching of OOM error slightly, the test case can catch OOM errors not starting with "Exception: "

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

Commit messages:
 - 8262000: jdk/jfr/event/gc/detailed/TestPromotionFailedEventWithParallelScavenge.java failed with "OutOfMemoryError: Java heap space"

Changes: https://git.openjdk.java.net/jdk/pull/2806/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2806&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8262000
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2806.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2806/head:pull/2806

PR: https://git.openjdk.java.net/jdk/pull/2806