RFR: 8257530: vmTestbase/metaspace/stressDictionary/StressDictionary.java timed out

[Coleen Phillimore]

Increase the timeout for this test a bit.  The bug didn't show any deadlocks or other indications that the test was stuck.
Tested with 100x on linux, macosx and windows platforms.

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Commit messages:
 - 8257530: vmTestbase/metaspace/stressDictionary/StressDictionary.java timed out

Changes: https://git.openjdk.java.net/jdk/pull/1810/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1810&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8257530
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1810.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1810/head:pull/1810

PR: https://git.openjdk.java.net/jdk/pull/1810