HTTP2 Request Sampler does not take user certificate in account

[vherilier]

Description

User certificate is not taken in account from Keystore Configuration element so the mutual 2 way SSL is not possible.

Motivation and Context

• JMeter version: 5.1.1
• Plugin version: 19.12
• Operating System version: any

Steps to reproduce the problem (if appropriate)

Resources

Checklist

• I have updated the documentation accordingly.
• I give my issue a label.
• I put my issue into Support project.
• I provide the required resources.