Fix Fault Tolerance multiple metrics provider test

[fabiobrz]

Fixes tests introduced by #316, as just regular executions were working, thanks to default server config.
Changes in here are to fix the test logic in order to work with Bootable JAR too.

TL; DR;

Other than fixing the multiple metrics provider test, I've refactored server config classes to isolate OTel subsystem

Verification job runs:

• [Regular execution]: eap-8.x-microprofile-testsuite - 1163
• [Bootable JAR execution] eap-8.x-microprofile-testsuite-bootable - 636

Please make sure your PR meets the following requirements:

• Pull Request contains a description of the changes
• Pull Request does not include fixes for multiple issues/topics
• Code is formatted, imports ordered, code compiles and tests are passing
• Link to the passing job is provided
• Code is self-descriptive and/or documented
• Description of the tests scenarios is included (see Update PR template to include TPG stuff #46)

[jbliznak]

LGTM, thanks Fabio 👍

[fabiobrz]

LGTM, thanks Fabio 👍

Thank you indeed for the quick review, @jbliznak!