RFR: 8256417: Exclude TestJFRWithJMX test from running with PodMan

Thu Feb 25 19:22:41 UTC 2021

On Thu, 25 Feb 2021 19:14:48 GMT, Mikhailo Seledtsov <mseledtsov at openjdk.org> wrote:

> 8256417: Exclude TestJFRWithJMX test from running with PodMan

Please review this small change that excludes the TestJFRWithJMX test from execution on Podman.
In summary, this test requires capabilities that are not available under "rootless" podman.
What was done:
  - added an at-requires method to return the name of the container engine
  - using the above named at requires to exclude this test as described above

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PR: https://git.openjdk.java.net/jdk/pull/2726