RFR: 8302744: Refactor Hotspot container detection code [v4]

[Severin Gehwolf]

On Tue, 28 May 2024 04:25:28 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> Severin Gehwolf has updated the pull request incrementally with four additional commits since the last revision:
>> 
>>  - Make read_string() take the output buffer size
>>  - Fix style for read_numerical_key_value
>>  - Use assertions for required parameters
>>  - Use boolean for tuples
>
> test/hotspot/gtest/runtime/test_cgroupSubsystem_linux.cpp line 71:
> 
>> 69: class TestController : public CgroupController {
>> 70: private:
>> 71:   char* _path;
> 
> Make it const char* const, and init via initializer list in constructor

Used initializer list.

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PR Review Comment: https://git.openjdk.org/jdk/pull/19060#discussion_r1617186380