RFR: 8287872: Disable concurrent execution of hotspot docker tests

Tue Jun 7 04:52:04 UTC 2022

On Tue, 7 Jun 2022 01:09:22 GMT, Mikhailo Seledtsov <mseledtsov at openjdk.org> wrote:

>> Please review this quick fix.
>> 
>> Before the cause of [JDK-8287744](https://bugs.openjdk.org/browse/JDK-8287744) is known, let's disable concurrent execution of hotspot docker tests to avoid failures in CI.
>
> Looks good.

@mseledts thanks for the review. I ran the tier-5 container tests and they all passed.

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PR: https://git.openjdk.java.net/jdk/pull/9047