RFR: 7266: Context Switch event handling breaks if JMC has old and new types parsed simultaneously

[Guru Hb]

On Wed, 9 Jun 2021 23:26:45 GMT, Henrik Dafgård <hdafgard at openjdk.org> wrote:

> This PR fixes an issue where the context switch rate attribute isn't final and can thus break if different types of profiles are parsed in sequence while still being read.

Marked as reviewed by ghb (Reviewer).

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PR: https://git.openjdk.java.net/jmc/pull/262