Set surefire runOrder to alphabetical for microprofile-health

[fabiobrz]

Here we're setting the property to alphabetical for both the regulare and bootable execution of the maven-surefire-plugin.

Resolves #325

Internal validation runs, specifically the Oracle JDKs related combos:

1. Regular execution:

• job: eap-8.x-microprofile-testsuite
• run: 1221 1222 & 1223

2. Bootable JAR execution

• job: eap-8.x-microprofile-testsuite-bootable
• run: 664 665 & 666

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[marekkopecky]

Thank you for this PR! I added just one minor comment.

[fabiobrz]

Thank you for this PR! I added just one minor comment.

Thanks @marekkopecky - BTW the failures are not related to the changes here, which confirm the workaround actually works to address the precondition described in #325

[marekkopecky]

Thank you for the updates, PR LGTM.