RFR: 8268873: Unnecessary Vector usage in java.base

[Sean Mullan]

On Mon, 14 Jun 2021 11:34:50 GMT, Andrey Turbanov <github.com+741251+turbanoff at openjdk.org> wrote:

> Usage of thread-safe collection `Vector` is unnecessary. It's recommended to use `ArrayList` if a thread-safe implementation is not needed.
> I checked only places where `Vector` was used as local variable.

The change to `PKCS7::verify(byte[])` looks fine.

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Marked as reviewed by mullan (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/4482