RFR: 8305511: Remove ignore from com/sun/jdi/PopAndInvokeTest.java

[Leonid Mesnik]

Test com/sun/jdi/PopAndInvokeTest.java has
 @ignore 6951287
bug 6951287 is closed as a dup for 6417053 which is closed as not reproduced.

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Commit messages:
 - @ignore removed

Changes: https://git.openjdk.org/jdk/pull/13317/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13317&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305511
  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13317.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13317/head:pull/13317

PR: https://git.openjdk.org/jdk/pull/13317