RFR: 8253607: [mlvm] meth/func/jdi/breakpointOtherStratum: un-problemlist and add randomness keyword

[Evgeny Nikitin]

Created as a replacement for the #309 (a new issue has been opened).
Pre-Scara thread: [link](https://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2020-August/039557.html).

I tried to reproduce the test failure multiple times with different VM parameters, but it always passes. I suggest
removing it from ProblemList.txt.

Second change is marking the test with randomness keyword from the JDK-8243427 (using reproducible random for mlvm
tests).

Tested using mach5 on the 4 platforms, 50 runs each.

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Commit messages:
 - 8253607: [mlvm] meth/func/jdi/breakpointOtherStratum: un-problemlist and add randomness keyword

Changes: https://git.openjdk.java.net/jdk/pull/345/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=345&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253607
  Stats: 2 lines in 2 files changed: 1 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/345.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/345/head:pull/345

PR: https://git.openjdk.java.net/jdk/pull/345